This trope explains it all, and made life difficult for Captain America's archenemy, the Nazi villain Red Skull, as other villains he's teamed with, notably Magneto, have ultimately attempted to kill him. At one point he even left him Buried Alive. Of course, being a Holocaust survivor who lost family to the camps, Magneto has a significant personal score to settle. This also goes for Doctor Doom, being of Roma descent, though they've managed some very occasional Teeth-Clenched Teamwork when Doom thinks there's something big in it for him. The Kingpin also refuses to do business with Red Skull, because like most old-school Mob bosses he's a patriot at heart, not to mention a devoted capitalist.
The Red Skull is a monster even by Nazi standards, and that's the whole point of him (according to the backstory account of Hitler more or less taking him on as a protege on what amounts to a bet that he could make him into the ultimate Nazi.) How monstrous the Skull became is illustrated by what he ultimately did to his mentor: Imprisoned in an inescapable, formless, empty void. By pure trickery. (The fact Hitler wasn't nearly as good a strategist as he thought he was, in real life or comics, probably helped.)
The relatively minor villain Flag Smasher (who attempted to destroy all governments on principle and was a particular foe of Captain America) went directly to Captain America for help when he learned he was being bankrolled by the Red Skull.
Probably the only exception to this is Norman Osborn, who not only tried to help Skull with his plan to gain control of Captain America's body, but bankrolled this endeavor and hoped to team up with the Skull as his own personal Captain America for the Dark Avengers. It makes sense, in retrospect, given this was Norman during his Dark Reign days, where he was very much an expy of Lex Luthor, along with the fact that Norman is a psychotic bigot himself.
The Mad Thinker, an enemy of the Fantastic Four, showed that there was a line he would not cross in a storyline where he formed a partnership with the Wizard (another enemy of the Fantastic Four) in a scheme that involved kidnapping Reed and Sue Storm's young son Franklin. When the Wizard revealed that the plan would more than likely result in Franklin's death, the Mad Thinker objected to it. Because the Wizard refused to abort the plan, the Thinker dissolved the partnership and contacted the Thing, Franklin's godfather, who aided him in defeating the Wizard.
Ultimate Spider-Man: The Enforcers betrayed their Boss, Mr. Big, and sided with Kingpin when Mr. Big defied him. Kingpin killed him while the Enforcers held him. Ox would eventually regret his choice, and started drowning his sorrows.
Subverted — when Cyclops complains to Magneto about the Brotherhood's murderous actions, he acts like it's all just Quicksilver trying to impress him and that he's actually disgusted by it, but later in the same issue he reprograms a fleet of Sentinels to attack humans indiscriminately and in the next issue he tries unleashing nuclear warheads to destroy America after getting sliced and diced by Wolverine. "Homo Superior loves all living things" indeed.
Forge attempts to confront Magneto about his plans when it really sinks in that he would be responsible for the deaths of millions. Being of the unassertive type, Magneto bullies him into submission easily.
As horribly depraved as they are, even the members of Weapon X were disgusted and horrified by how the mutant Sabretooth volunteered to work for Weapon X, helping them hunt down and torture other mutants and his love of killing, while other mutants had to be brainwashed and tortured into service.
In West CoastAvengers, this leads to the defeat of the Lethal Legion. The villains are more than happy to engage in things like murder and kidnapping, but end up turning on their boss, Grim Reaper, after he expresses white supremacist sentiments at a time when his teammates include Black Talon/Samuel Barone (who is black), Man-Ape/M'Baku (who is black), and Nekra/Nekra Sinclair (who is an albino African American).
Wolverine's nemesis Sabretooth pulls an epic Heel–Face Turn and becomes a well-respected superhero. He still started off as a pretty bad guy, but realized he'd had enough upon learning that Apocalypse planned to kill off the entire human race. (It should be noted that in this reality Sabretooth was less animalistic and frenzied than his standard counterpart.)
While not going so far, Mister Sinister is also disgusted in this continuity by Apocalypse, who he considers unnecessarily barbaric, and by Dark Beast, who he disdainfully regards as a petty sadist.
The mainline Sabretooth regretted assisting a supervillain in brainwashing Deadpool to kill his own family. Not enough to not go through with it, mind you. Just enough to regret it. Additionally for all his depraved cruelty Creed does believe a real parent should care for their offspring and not hurt them, case in point Mystique's appalling treatment of their only son Graydon utterly repulsed him and he was genuinely angry when she once turned into Graydon to taunt him and in Weapon X (2017) was further angered at Raven's willingness to leave Graydon in hell after having put him there herself.
Deadpool: While not a villain, Deadpool generally has very little regard for human life and might as well be the Trope Namer for Comedic Sociopathy, he has a firm line: "Kids. Are. Off. Limits!". He flips out after Fantomex kills a child who could've potentially become a villain, and makes sure to give him a What the Hell, Hero? speech after the mission is over. He even goes on to form a close bond with a clone of the murdered child, leading to a few Pet the Dog scenes.
Even back when he was a completely amoral mercenary who would switch sides in the middle of a fight if he was offered more money, Deadpool had standards. Once, he was part of a team of mercenaries that had been hired to capture Wolverine, and they tailed Logan to a bar. The rest of the mercs were eager to get started so they could collect their paychecks, and got ready to leave the room from where they were watching Logan and enter the bar.
Mercenary: Well, we may as well get started- Deadpool: Sit down. Mercenary: What? Deadpool: The man just bought a drink. We let him finish it. Now sit down.
He also kills a psychiatrist who took advantage of a troubled teenaged client, which resulted in her committing suicide. He did the job for free, and was completely serious throughout pretty much the entire story and grew quite pissed when he began talking about it. The moral? If Deadpool's inner voices ain't around and he's being completely calm and serious, someone has done something even he wouldn't do. And he's not gonna kill them, he's gonna murder them.
In the Deadpool vs Carnage arc after he finds the bodies of a couple and their children whom Carnage had taken hostage and murdered, he mentions that while he and Carnage are both crazy he would never do something like that. Basically, hurting kids is one of the very few lines that Deadpool won't cross, and is one of the quickest ways to legitimately anger him.
Deadpool also hates racism. When out with Spider-Man, he uses an image inducer to change his appearance for the club. Spider-Man notes that he's black now, which Deadpool says is awesome because being black is cool. Unless you're racist. Spider-Man says he's not racist but- Deadpool cuts him off, noting that's good because he can't stand racists. One of his dearest friends, Emily Preston, is black and his daughter is usually depicted as a Chocolate Baby - though it varies on occasion, Depending on the Artist.
During the time when Deadpool was working for the Butler, he was sent to go and kill a married couple, and was accompanied by Sabretooth. Once all was said and done, Deadpool would have his memory erased of the event. Deadpool pretty much blew up the house. Turns out, that couple were Wade's parents. Wade pretty much blew up his childhood home, and doesn't know because his memory was erased afterwards. It is very obvious Sabretooth thought this was awful, and clearly felt bad for Deadpool.
Played for laughs in an issue of Spider-Man where Carnage (who had just committed yet another massacre, and left one person alive to sow panic) attacks a Jerkass businessman who had illegally parked in a handicapped spot.
Carnage: Hey, mister! In case you didn't notice, that spot's reserved for the handicapped.
Businessman: Mind your own business, shorty, I'm in a hurry.
Carnage: Shorty... moi? Aw, gee... and here I was, trying to save you from getting a ticket. Heyyy! I just got an even better idea. If you really want that space—I'll cripple you so that you're entitled to it! I never could stomach a pompous fool like you! You think you're better than other people just because you have a fancy job and a fat wallet!
Mighty Avengers introduces a group of German extremists called W.E.S.P.E., who apparently hate Hydra. When someone mentions Hydra, one of the W.E.S.P.E. members remarks that he and his teammates may be nihilists, but at least they're not Nazis.
In Secret Empire, Black Ant and Taskmaster are initially wary of working with Hydra. Black Ant even says while he and Taskmaster may be amoral criminals and killers, they aren't racists or Nazis. They end up being persuaded to join after Madame Hydra claims that the rumors of Hydra being Nazis are merely lies spread by their enemies.
In The Incredible Hercules, Hera, currently running the Olympus Corp, has a plan. A big plan. As of the writing of this entry, we don't entirely know what it is. What we do know, though, is that Norman "Green Goblin" Osborn, one of the ultimate dog kickers in Marvel as a whole, is downright aghast when he finds out what it is! If the man who is turning the world into his own personal oyster, and taking numerous baddies along for the ride, sees something as going too far, then that should be ringing a multitude of alarms.
Turns out it was the destruction of this universe in favour of one of Hera's own creation. No wonder even Norman couldn't stomach that.
Before Parker Robbins become The Hood, he was a thief, liar and supervillain fan who seduced and knocked up a gorgeous girl, and was cheating on her with a Russian prostitute. His cousin, John King, is an alcoholic who never worked a single legal job in his life. But when an agent of terrorist organization HYDRA offered them a job, they told him about how much they hate terrorists, beat him and stole his shoes.
Would have stolen the suit but John pissed on him.
In X-Force (the team that later became X-Statix), while the team isn't evil they're certainly amoral. However, when they see the patently insane and violent (even by their standards) Corkscrew making his way through team tryouts like a pro, it's decided that the only option is to have Doop take him out back and murder him with a logging axe.
In the twelfth ever issue of Daredevil, Matt Murdock happens to be on the very cruise ship boarded by fearsome pirate the Plunderer. After changing into his Daredevil costume and pounding the Plunderer's goons, he makes a break for the man himself. But the Plunderer's taken hostages and threatens to toss them overboard into the shark-infested waters unless Daredevil surrenders. Not willing to risk their lives, DD relents, and one of the Plunderer's crewmen suggests tossing him overboard instead. The Plunderer is positively outraged at the very suggestion: "Silence, you scurvy toad! I have given myword!" For his part, Daredevil is impressed.
One Daredevil graphic novel has a mob boss refusing to let the Mafia make money from rackets such as drug-dealing and child prostitution; the mob may be criminals, but they aren't animals. Unfortunately for him, his consigliere is Wilson Fisk, better known as the Kingpin, who snaps his neck and takes over. It's implied that Fisk was actually privately encouraging the guy to take a stand on this issue, just so he could have an excuse for his murderous coup.
Kingpin has been the subject of flip-flops of epic proportions: either he thinks drug dealing is rock bottom, or he's single-handedly keeping about half the world's drug barons in business.
In an early issue of Matt Fraction's Invincible Iron Man, Ezekiel Stane murders a bunch of tobacco executives after explaining to them that, even if he makes weapons for terrorists and psychos, he is disgusted by how they make their money.
Ezekiel: I might deal with murderers, but you guys — you guys are addicting kids and murdering them yourselves.
In the Fantastic Four Unlimited from July 1995, the villian Maelstrom is willing to destroy the universe... but not his own son.
Maelstrom: But— I'll NOT slay my own offspring!
Ant-Man: I can't believe this! Maelstrom— going paternal on us!?
Parodied in Runaways with Chase's mom, who reacts with horror at the suggestion that she get an abortion, saying it would make her a monster... while standing in front of the human sacrifice she is about to make in order to bring about the end of the world.
Played straight later on when Molly's grandmother is introduced. While she's a Mad Scientist who has no problem conducting experiments on people, she's still utterly disgusted by the Pride and hated them for involving Molly's parents in their bullshit. Dr. Hayes outright considered Chase's parents to be insults as scientists, and tried to talk Gene and Alice into leaving saying she would've gladly given them the power they sought if they'd been patient. Dr. Hayes also appears legitimately horrified when Gert mentions her parents never took her to Disneyland.
In an issue of Marvel Adventures Spider-Man, the Grey Gargoyle is commissioned by a wealthy client to steal the Venus de Milo. Once he returns with the stolen statue, the client has one more job for him; to petrify a kidnapped super model so he can chop off her arms and put them on the statue. The Gargoyle responds by apologizing to the young lady for what she's been put through then petrifying his former client before he leaves.
Given that Doom has frequently shown outright paternal feeling for the Richards kids (particularly Valeria) himself, he probably figures he could raise them better himself - something tacitly confirmed in Secret Wars (2015).
Doom also has no tolerance for racism. In the graphic novel Emperor Doom, when he finally succeeds in taking over the world, one of the first things he does is end apartheid in South Africa. Which makes sense given that his mother was Romani, an ethnic group that is still routinely persecuted in many parts of Europe. Later, in the Vampire State arc of Captain Britain and MI13, he mocks Dracula's Islamophobic racism, stating that normally he derides racism in humans because it's an assumption, in a 'magically created viral package' like a vampire, it's almost amusing.
In the Lee-Kirby "village of the damned" Fantastic Four story, Doctor Doom has the Fantastic Four trapped in his own private museum in Latveria, and is about to kill Reed, Ben and Johnny in the presence of Sue and Crystal (who don't know what he is doing - that for an extra point of cruelty). However, a minion takes it on himself to try and murder the male FF with a flamethrower, even though Reed yells at him that that would burn untold amounts of great art. As it turns out, Doom agrees, and he turns his sonic weapon on the minion, killing him instantly, and showing his hand to Reed. But, as Doom says as he is killing the minion, what are a few lives in front of immortal art? A feeling we might even agree with, were it not that he means, what does it matter if I don't get to murder people just this once?
In Doom's short-lived feature in Astonishing Tales, he once tortured a prisoner for details about Vibranium. As soon as the prisoner gave up the information, Doom released him unharmed. When one of Doom's henchmen suggested that they simply kill the prisoner instead, Doom backhanded him across the room and threatened to have him take the prisoner's place on the torture rack if he ever suggested something so dishonorable again.
Jonathan Caesar was a Yandere obsessed with Spider-Man's wife Mary Jane, who was willing to commit murder to have her and ruin her life to break her spirit. However, he was disgusted by a mercenary he hired who killed animals for fun, calling him a "barbarian".
Marvel MAX Bullseye is one of the few people you wouldn't expect to have standards, seeing as he's done many horrifying things over the course of his self-titled arc in The Punisher MAX, even the deaths of four different families in just a week, consisting of a wife, a son and daughter, slaughtered to reenact the death of Frank Castle's family, so he could feel how Frank feels. But he, of all people, is not a fan of smoking.
Superior Spider Man establishes that Doctor Octopus, despite all his faults, has one particular Berserk Button: harming children. He savagely beats (and nearly kills) the Vulture after seeing him strike a child, and goes out of his way to save the life of a young girl he had earlier injured during one of his schemes. (According to his various origin stories, Octopus was physically abused by his father. He can relate to child abuse victims.)
In an issue of Spider-Man, Jason Macendale (aka the Hobgoblin and Jack-O'-Lantern) tries to sell his soul to the demonic N'Astirh in exchange for increased power. N'Astith responds by laughing in Macendale's face, telling him that his soul is so warped and disgusting that not even a demon would want to buy it.
Black Tom Cassidy is a longtime X-Men villain who has committed some truly despicable acts, but he cares for his niece and former partner in crime Theresa. When Tom saw that Theresa had been paralyzed by one of Spider-Woman's venom blasts and mistakenly thought she'd been hurt (or worse), he was genuinely distraught. After realizing that it was his life of crime that had endangered Theresa in the first place, Tom lied to the police and told them that she had nothing to do with his heists, and asked Storm to look after her.
Wolverine: In the Wolverine Weapon X story The Adamantium Men, Wolverine and his rival combatant (part of a twelve-man mercenary team, employed by Blackguard and made to emulate Wolverine with laser claws and nanite healing factors) are busy fighting in the streets of San Francisco. The two have by this point fought all the way to street level and are about to deliver what might be the deathblow, when they see a schoolbus full of young children. To spare them from harm (and the trauma of their very violent combat) they retract their claws and let the bus pass, then choose to move in case another one passes. The rival was dishonourably discharged for unknown reasons.
It gets a bit confusing when you remember that at the very start of the issue the team were shown killing three children. Admittedly the rival may not have actually been there.
X-Men: Black: In Mojo's issue, when he sees a little girl about to be run over by a man who is texting whilst driving, he instinctively leaps in and saves her by stopping the car with his Super-Strength. He also verbally chews the driver out for not paying attention whilst driving. Before that, he is offended by the one racist old man who insults Glob for being a mutant.
Using The Wasp as a living bomb was apparently too much for even Norman Osborn and Bullseye. When the whole force of Marvel's heroes charged the Skrulls in vengeful rage, they joined in, looking just as pissed for what just happened as the good guys.
In a one shot issue of The Amazing Spider-Man (1999) illustrating the aftermath of the September 11th WTC terror attacks, Doctor Doom, Kingpin and Magneto turn up to help with the rescue effort at the World Trade Centre along with all the heroes, and superheroes. This drew criticism, because some of the villains featured have been shown to do worse or as bad as that. One of them was Juggernaut, who's actually attacked the WTC himself in the past.
Of course, in Magneto's case, he only tends to do such things when his powers have driven him insane or with the motive of protecting mutants. This, to him, would be pointless. No explaining Doom's presence, though.
Doom's presence shouldn't really be that surprising. As both a monarch and someone who seeks to build a utopia, the idea of fanatics who kill innocents simply to incite fear and panic would be deplorable to him as well.
The Kingpin's willingness to help out seems to be a combination of maintaining his Villain with Good Publicity reputation, his genuine love for New York City (and the United States—as noted above, like most Mafia bosses, he's a patriot at heart), and his disgust at the idea of committing such a horrible massacre for the sole purpose of terrorizing innocents, as his own schemes are always a means to a greater end.
The Incredible Hulk: In Peter David's "Countdown" story arc, the villainous Leader, who once gamma-bombed a town of 5,000 people just to see how many would survive and gain gamma powers (answer: five), states that he can't bring himself to kill his own brother.
For a very long time, Spider-Man villain the Lizard was unable to harm Billy Connors, the son of his human alter ego. This is no longer the case, and the Lizard devoured Billy later.
The Mighty Thor: Even though Loki wants to take his father's crown and rule Asgard, he does not take kindly to anyone trying to destroy it. Asgard is still his home, after all. This is taken to its extreme during the Ragnarok arc, where Loki commits mass murder on a grand scale and even causes the death of his own mother. He's appalled when he learns that Asgard is going to be destroyed, as all his murderous actions prior to that had been so that he could rule it. In his mind, at least the horrible atrocities he committed had a point to them.
As of late he is also strictly against child murder... for his own surprise.
Another issue has a group of armored men trying to rob the federal reserve, believing they're paying back the government for ignoring their needs after their service in the armed forces. Beta Ray Bill battles their leader who turns out to be the Titanium Man, who's using the men in a plot to bring down the American economy.
Armored figure: Sarge, I didn't spend three years in 'Nam just to help some commie shaft my own country!
Sarge: You're right. We may be crooks, thieves and criminals...but by God, we're AMERICAN crooks, thieves and criminals!
They help Bill stop the Titanium Man and in gratitude, Bill lets them go before shutting off their armor.
Way back in Rom Spaceknight, the Skrulls turn out to have limits, too. They save a town from the Dire Wraiths because they hate Dire Wraiths more than anything else in the universe (yes, even the Kree.)
During a prison break in Thunderbolts, the Juggernaut is offered a chance to kill a guard who has been captured by two of the inmates. Juggy states that murdering a scared, unarmed man with no powers is beneath him, especially since there'd be no sport in it. He convinces the inmates to spare the guard, and then leads them into a trap.
In general, the Juggernaut has a fairly developed code of conduct as bad guys go. Theft and property damage might be A-OK in his books, but hurting kids, backstabbing people after they've helped you or hurting people purely for the sake of being a Sadist are all no bueno as far as he's concerned. During the Gauntlet storyline, he was even chosen by the Enigma Force to become the latest Captain Universe to repair the tectonic plate damage he had caused while digging his way out of concrete after his original battle with Spider-Man (albeit after the Enigma Force's originally chosen host preferred to try and vent his vendetta against the Juggernaut rather than complete his assigned mission).
In an issue of Avengers Academy, the kids end up in a fight with Spider-Man's enemies the Sinister Six. Mysterio orders Rhino to kill the students, to which the thug responds by saying even if they're superheroes, he's not about to murder children just to soothe his employer's damaged ego.
Speaking of which, the X-Men villain Arcade would later use his Murder World park to orchestrate the deaths of several teen superheroes, including a few students from the aforementioned Avengers Academy, during Avengers Arena. In the follow-up, Avengers Undercover, it was revealed that Arcade attempted to use this "feat" as leverage to get Baron Zemo to let him join the Masters of Evil. A disgusted Zemo proceeded to inform Arcade that there was nothing impressive about slaughtering a bunch of children, and that the only thing of value Arcade could bring to the table would be the advanced technology behind Murder World. Rather than allow him to join the Masters of Evil, Zemo simply recruited Miss Coriander (the one who actually built Murder World) and had Arcade imprisoned. During the final battle, Zemo even stopped to thank his opponent after he saw her blast Arcade into a wall.
Sandman is generally not a nice guy, but he stepped after seeing Bombshell being abused by her mother (who was one of his teammates on the Sinister Six at the time). This makes some amount of sense, as Sandman has a surrogate daughter of his own.
Titania, a villain of She-Hulk and Deadpool, among others, might be murderous and violent, but she will tip workers properly. Not tipping would be rude.
This makes some sense when you consider that prior to being turned into a supervillain, Titania was a scrawny blue-collar girl who was constantly picked on and slaved away in menial jobs. She knows how hard life in the service industry can be.
She shows another side, along with other villains, at the end of Illuminati, when the Hood suggests that they kill the Avengers' families. This, along with finding out that he also enforced a Heel–Face Door-Slam to get her to join him and his group, is enough to get everyone to quit and, for good measure, has Titania destroy the Hood's hood, rendering him powerless once more.
Venom (Eddie Brock) is notable for the fairly large amount of standards he has during his stint as a anti-villain, which paved the way to his successful transition into a anti-hero. Like the rogues mentioned above, he refuses to ever harm innocents and resists the symbiote's more violent urges, (being even more successful at it than Flash in regard the symbiote's hunger for human flesh) though he unwittingly tends to cause loads of collateral damage in his fights with Spider-Man. He's also disgusted by his psychotic "son" Carnage; when Carnage first appeared, Venom was willing to set aside his feud with Spider-Man to work together and stop Carnage from hurting anyone else. This is all because in Brock's delusional mind, he's the "lethal protector" of New York and Spider-Man is the monster threatening the city.
Indeed, Venom's disgust with Carnage is nearly universal across every continuity and medium they both appear in, and although in other media Venom has vacillated between Anti-Hero and villain of the worst sort, regardless of his position on the moral spectrum in that universe he's always willing to drop everything and team up with everyone from Spider-Man to Captain America to take Carnage down.
During Beyond!, the Mac Gargan version of Venom was one of the many characters saved by Gravity's Heroic Sacrifice. At the boy's funeral, Venom showed up in disguise to pay his respects.
Alyosha Kravinoff: You're a piece of crap, Gargan. Venom: I'm a grieving piece of crap.
While Apocalypse's solution to the crisis involved him attempting to murderReedandSue Richards' son, Franklin he was horrified by Onslaught's actions and wanton destruction (and in fact, in addition to ridding himself of a potential rival, Apocalypse's attempt to kill Franklin was also done to try to end the conflict).
Played for laughs in an early Howard the Duck story. Howard and Bev are in a mansion in the Poconos, when an enraged group from a nearby town start attacking the mansion because they've got a beef with the owner. The owner releases the hounds, prompting this exchange:
Townsperson #1: "Aw, fudge! It's them dratted, dad-blamed dogs again. Somebody tell Arnie to get his butt up here with that flamethrower."
Townsperson #2: "He won't burn dogs. Only people. He likes dogs."
Taskmaster may be willing to work for an awful lot of people as long as the money's good, but he has nothing but sympathy for the terrible wages of security guards and tries to spare them where possible. In his 2021 miniseries, he also notes he's made it an official policy to refuse all offers for work from clients with connections to Nazism or its Marvel offshoots — although that's at least partially Pragmatic Villainy, as he notes that doing that keeps him out of the line of fire from The Punisher.
In the Wolverine story arc "Get Mystique", at the end, after their climactic fight to the death, Wolverine confronts a dying Mystique:
"We're nothing alike, Raven, I want you to die knowing that. Lord knows I've made mistakes, and most of them involved someone dying who shouldn't have, but I'm paying for my mistakes by trying to put things right, but you just go on over and over making the same damn ones..." *Then he drops a gun holding a single bullet and says* "...and I think you know what that's for". *walks away, as Mystique screams and curses after him*
In the Dark Avengers: Ares three-part mini-serial, after Ares' malevolent godly son Kyknos impales one of Ares' men and makes a truly awful pun about becoming "a fisher of men", a disgusted Ares declares that whilst he is the god of war, slaughter and even murder, he's not the god of sadism as he attacks Kyknos.
In the Spider-Man issue "Spider-Man's Tangled Web #13", the story revolves around the Vulture and Kraven the Hunter sitting down and griping about their past encounters with Spider-Man at a table in The Bar With No Name, joined by a third man in a face-shadowing hat and trenchcoat. During their tales, this unknown third party sits politely through their stories, commenting on them and gently teasing the two men. Finally the two ask this gentleman what's his deal with Spider-Man and how come the Webslinger treats him differently. That's when he stands up, takes off his hat, and places a pumpkin bomb on the table, revealing himself to be Norman Osborn. Smiling hugely, he flippantly notes that he kidnapped Spider-Man's girlfriend and killed her right in front of the webslinging hero, which he describes as "a blast!" Not only do Vulture and Kraven give him looks of absolute horror, the entire villainous population of the bar turns to face Norman with similar expressions of shock and horror. Norman just politely takes his leave, grinning all the way, and is watched by everybody as he goes. Read the exact moment here.
In The United States of Captain America, Speed Demon states that he would never willingly work for Sin (the daughter of the Red Skull), as while he may be a career criminal, he's not a Nazi.
Wolverine & Gambit: Victims: Once Big BadArcade's real motives are exposed (revealing that he killed his own assistant Miss Locke in a moment of rage and fear, then tried to frame Wolverine for her death) his lieutenant Martinique quits in disgust. She also uses her Master of Illusion powers and telepathy to leave him trapped in a mental loop after the police capture him - endlessly hallucinating that he's trapped in a lift full of copies of the murdered Miss Locke.
In Yellow Claw, published by Marvel's predecessor Atlas Comics, criminal Rocky Miller rebels against his employers, the Claw and Voltzmann, as soon as he realises they're sending stolen secrets back to the Chinese government. He's a crook and a thug, but he's an American.
Expressed by the veteran super-villain Electro in Spider-Man Vol 4 #10, when confronted by Spider-Man's new kid sidekick instead of an adult hero: "You usin' child labor now, web-head? That's messed up. I'm gangster all day, but I ain't about to zap some kid. What's wrong with you? "
