As far as I can see you’re the person who brought up Nazis out of nowhere. That’s what they are making fun of. People randomly screaming Nazi and calling people nazis for no good reason. This was a meme about capitalists exploiting workers and basically running the planet. It had nothing to do with Nazis specifically or even American specifically yet you seem hyperfixated on both of these things for some reason. You don’t even seem to understand what Nazis even are, saying things like Marxists can be Nazis which is patently absurd. Have you ever heard of Godwin’s law?
You realise that to deradicalise someone you actually have to speak to them, right? I believe this is what the guy you are talking to is referring to. Deradicalisation is something both governments and leftists do when someone goes to the far right. The answer isn’t just screaming, ignoring, and killing people all the time. Have you never heard the term diversity of tactics?