I think the main issue for people is making this drawing to begin with, probably? I understand the reasoning behing political cartoons, and personally I don't mind them, they're certainly not for me but I'm not gonna make a scene over them.
When you draw some youtuber you don't agree with as Hitler, you're gonna have people who might get offended just over the sight of Hitler itself, that's one reason, you'll also get nazi sympathizers who don't agree with you, which would also bring the score down, and you will also get people who see this and think "you're not being too mature yourself by depicting someone you don't agree with as Hitler" being the third reason.
Personally I don't care and I choose to review the drawing based on the skill of your art itself, which is good, but people in here -or any social media, for that matter- will most likely see this and judge the drawing for what it is, regardless of what your stand on the subject is, this isn't a NewGrounds thing, mind you, it'll be the case in any social media you choose to do this in.