These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Is Schultz really the dim-witted Bavarian hick he appears to be, or is he Obfuscating Stupidity to cover his secret opposition against the Nazi system, while at the same time consciously helping Hogan's plans? It's more believable when you learn Schultz in peacetime was CEO of one of the largest toy-makers in Germany.
The same can be wondered about Klink. Schultz once admitted to Klink that he was a member of the German Socialist party before the war, at the same time Klink admitted that he hated the whole Nazi system - particularly the SS. These probably helped them to turn a blind eye to some of Hogan's most blatant lies and plots.
Despite portraying Nazis as buffoons and idiots, several critics took the show to task for just that reason ... that they were portrayed as comics and good for a harmless laugh and not bloodthirsty, cunning and vile human beings who were (on Adolf Hitler's orders) out to exterminate entire races of people. One notable scathing critique came in the 1974 book "Let's Stop Destroying Our Children," which gave harsh criticism to the series, at the time a top-rated hit in syndicated reruns.
Newkirk and LeBeau's teasing Carter for his Sioux heritage. Particularly jarring since the show treats all of its other characters respectfully.
Ensemble Darkhorse: Sgt. Wilson. For a character who appears for 1 minute in one episode ("Operation Briefcase"), he is frequently featured in fanworks. Most likely so because he is the OC Stand In for a medic.
Fair for Its Day/Values Resonance: In the casting, as described in the introduction to the main article. Critics who slam the program for trivializing Nazi concentration camps (always seeming to ignore how the show actually depicts a POW camp for Western Allied prisoners, not a concentration camp proper) never get around to just how much of a groundbreaker it was, in the American TV environment of the early 1960's, to cast an African-American not as second- or third-banana comic relief, but as Hogan's right-hand man and the man responsible for creating all the gadgetry the team needed to do its work (adumbrating Mission: Impossible).
Fridge Horror: Whenever Hogan is ordered to eliminate a female target (such as in "Who Stole my Copy of Mein Kampf"), rather than killing them, he sets them up to be arrested by the Gestapo. Isn't that ''worse''?
In "Klink Vs. the Gonculator", Sgt. Carter is trying to catch a rabbit. Former US president Jimmy Carter was attacked by a giant rabbit on a fishing trip in Real Life.
In-show, in an early episode Newkirk adamantly refuses to dress up as a woman (before a Gilligan Cut showing him in a wig and a dress, of course). Of the five Heroes he turns up to be the one who later dresses up as a middle-aged/old woman most often over the course of the series.
Some of Hogan's more... aggressive actions towards women come off as creepy to modern eyes.
While Kinchloe gets his chance at two women, both of them are black. He almost never vocally shares the other inmates' interest in beautiful white women. This might also be an aversion of Politically Correct History, as it wouldn't be particularly smart for a black man to do so even among friends in that time period.
When Carter reveals that he is part Native American, LeBeau and Newkirk spend the rest of the episode mocking him over it, to his evident displeasure. Especially jarring given the show's generally respectful treatment of its African-American characters.
Similar to the Native American example, women who aren't young and thin get hit pretty hard. Frau Linkmeyer gets the worst of it (due to appearing the most), but Burkhalter's niece in "Gowns by Yvette" is mocked for being a pudgy woman that no man would ever genuinely want.
While the original is unclear on where in Germany the Germans came from, the aforementioned dub has Klink from Dresden and Schultz from Munich. Why? Because the Saxon and Bavarian accents are the ones other Germans find the funniest...
There is an old rivalry between Bavarians and the rest of Germany, or, as the Bavarians say it, "Prussia". This is also referenced in the German dub. Schultz even calls Klink "Saupreiß" on some occasions.