But who decides what's racism and antisemitism? I'm asking you because I've seen countless times how some democrats being antisemites publicly and they are being praised. When they are asked they say that has nothing to do with antisemitism.

To me this looks more like "I'm going to censor only what my rivals say". Do you think they'll remove content that says "white people <insert stereotype here>"?

This is stupid no matter how you look at it. You can't censor. You cannot fight stupidity with more stupidity. And please, don't say again that stereotypes can end up with millions dead. What happened in the nazi Germany goes beyond that. You can't just synthesize hundreds of years of religious and ethnic problems into "stereotypes".