I heard they were exiled over 200 times, how and why.
It’s easy to say anti-semitism, but what caused anti-semitism? Why don’t people just let it go? What did Jews ever do to deserve this, is it all because they killed Jesus?
Various reasons that had nothing to do with what Jews actually did. Have a look at the answer by /u/yodatsracist on the history of European antisemitism here, and by /u/kieslowskifan on the specific case of Nazi antisemitism here.