Hitler, Nazis and so on and forth

So, I've been spending too much time on the Third Reich lately, but what can I do, it's fascinating, the dark side of human existence, whatever. Maybe I'm just dumb and incapable to devote my attention to more current and relevant(?) events. In any case, I spent a decent amount of time on youtube and ina.fr today looking at old footage, after having read 3-4 books on this topic the last few weeks. Youtube being what it is, there is a massive amount of crap on there (old and new songs celebrating Pétain for example, and no I didn't even look for any of these on Hitler, no tolerance for that kind of shit).

To make a long story short, I found this video (or refound it, I had known about it). It was done by a German comedian who also made a comic about Hitler who has survived the war and is confronted with life as we know it. Moers (the author, writer) makes me chuckle I have to admit it. But is that legitimate? Am I even allowed to laugh at this (not that I really do, but you get my point I think/hope)? Can you poke fun at this man by making him seemingly ridiculous and pitiable. I mean he was ridiculous, but not in the sense conveyed here. Definitely more questions than answers, I wish I had some (answers that is).