Why is Antisemitism becoming normalized?

I just don’t get how people tell me “the Jews run cand control the media”, when just logging into social media and reading comments under a post like this has become all too common. Before it was just Twitter so I deleted it, now it’s on Instagram. Another part that hurts is whenever I see another black person saying someone is a “fake jew” or “edomite.” Like I get it as an African American or your identity was stolen from you but why must you then try and steal someone else’s.