Because those same people were pointed at as the cause of all problems and physically expelled, at least when they weren't murdered, like a hundred times over centuries. Kings, rulers, thought leaders always pointed at the jews and said "look they charge you interest on your debt, theyre so evil" while they were the only religion that ALLOWED them to charge interest on debt, meaning they were basically the only class who could be bankers by Christian rules, which often meant regional laws.

What's actually kind of neat is that Islam majority countries solved the same problem by inventing new financial instruments and skirting the rules as written. "I'm not charging interest, this is a fee for the service of this weird rent to own structure we made". I don't think it's common in Islam to hate jews for being "The bankers".

But you knew this, because you didn't ask this question in earnest.

Running large financial entities can cause generational trauma, or something.