They're not arguing in bad faith. You maybe didn't notice the user change, @PatFussy@lemm.ee didn't say anything about what fascism is, they literally just asked for more information. If you did notice the username, then you're making one hell of an assumption over the tone of their comment.

That CSAM comment was clearly a joke in light of the shitpost memes community closing. People joke in meme threads.

You're exaggerating things and turning another user into a scarecrow just so you can jump down on them and circle-jerk over them. That's very disgusting behaviour on your part.