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.
Anvilicious: Invoked. The whole film is so insanely over-the-top that Rodriguez would have been crazy to try shoehorning in a serious political message; it's liable to make you laugh out loud whichever side of the U.S. Border debate you're on. Crosses into Fridge Brilliance when you realize the movie is done in the same spirit as ridiculously cheesy Blaxploitation flicks, where corny, awkward social statements, stereotypes, and violence against hilariously over-the-top oppressors were par for the course.
Complete Monster: Mexican drug lord Rogelio Torrez. Of all the villains, Torrez is the only one who doesn't get any redeeming qualities, motives, or hints of remorse, and does what he does only to line his own pockets and to satisfy his sadism. He rockets past the Moral Event Horizon in the first five minutes, kidnapping a girl who has info on his drug ring, brainwashing her so she'll turn on Machete when he tries to rescue her, and then blows her brains out for her loyalty. He brings in Machete's wife's and chops her head off, and casually notes he also killed his school-age daughter on the way there. He doesn't want to give Machete an honourable death by cutting of his head, so instead he sets the building on fire and leaves him for dead to be burned alive. Later in the film he just chuckles at seeing Booth strangle one of his minions to death in front of a computer screen, and is revealed as the mastermind behind the entire Evil Plan to expel all the Mexican immigrants from the US, so he can get a monopoly on the entire drug trade by controlling the border. Even his death scene just manages to make him more disgusting rather than admirable; when Machete impales him he doesn't want to admit he lost and go out in a blaze of glory, so he just drives it in further so it can be said only he himself was able to kill him in the end. Even his female bodyguard walks off in disgust at that point. He used to be Machete's partner in the Federales, so he actually was a good guy at one point before he decided to go dark side entirely of his own will.
Hilarious in Hindsight: In this film, Steven Seagal plays a Mexican drug lord who doesn't even bother to try an accent. In 2011, Seagal was sworn in as a sheriff's deputy in a west Texas county, charged with handling immigrants who try to—what else?—cross the border.
Narm: "We didn't cross the border! The border crossed us!" Obviously intentional, and before that...
"Machete don't text."
In the sequel: "Machete don't tweet".
Machete's wife's beheading is deliberately filmed, so that when Torres completes his swing, her head's still attached a good two seconds. The head falling to the ground is so fast and sudden, it's hilarious.
Machete's gigantic... machete. It's bigger than him.
One-Scene Wonder: Cheech Marin has only a couple of minutes of screen time, but manages to steal every scene.