No ISM is beyond reproach or comedy.
But, political correctness, came along and ruined that, by demanding all 'isms' esp racism, be given a special, elevated protection, above that said reproach or comedy.
The day that happened, we lost all sense of humility.
Comedy is a human self-referencing code, in a fixed location, in certain context. No one has the right to remove that context, or to politicise it, but that's sadly, what political correctness did.
Now we pay the price.