Stop reposting greentext from the antisemite website. Stop boosting it. It is not 'culture', of the nebulous thing you call 'internet' or otherwise. It is a steaming pile of shit you refuse to flush.
If a single one of you posts something like: "But what about the other boards?" or "it was different in my culture/language", you are just telling on yourselves. Your internalized antisemitism and rose-tinted glasses from your younger years are not a substitute for real, quantifiable harms to the Jewish community. I'd sock you in the face in real life and maybe that would knock your so-called "anti-fascist" priorities back in order.
You are not and never have been an ally or comfort to the Jewish people if you continue promoting this shit. I know you are probably just going to selectively choose to ignore us when we seem 'unfun' or inconvenient to your friend groups. This is just a confirmation of what I have already experienced a dozen times from performatively progressive folks. You'll bow to the pressure for the fucking meme, you aren't an ally. You aren't a friend.