While I've been living in Europe for the past 3 years I have definitely experienced more antisemitism than I have since being bullied as a kid in the USA. People bringing up the rothschilds (lots of banking talk), casual insulting of jews while also disparaging other minorities, claiming that the jewish people deserved the holocaust because of what they did afterwards (implying Israel).

All to say, I think that anti-semitism in europe is more prevalent than in the USA, but I am unsure how widespread it is. I don't think it's necessarily common but I don't really come across as jewish so who knows how many people just treat me as another white person. I think a lot of it comes from just not knowing any jews or really learning about them in their history. My landlord was a history teacher and had no clue about jewish history in europe outside of the holocaust. Her son even less. Folks end up learning about us through the news, especially about Israel and/or wealthy jewish bourgeois. It's basically just 'socialism of fools'. People making uncritical critiques of Israel, banking, capitalism, their personal material woes and blame it on the jew. Tying it up with a nice bow is the dumb conflation of anti-Israel sentiment with antisemitism which made it even messier to engage with people about it.