Open antisemitism used to be very widespread. It became rarer during and after World War 2, because when your enemy's main thing is hating the Jews, you have to distance yourself from that (or, for Germany, the state's legitimacy is tied to convincing everyone they're not nazis anymore).

Even now you don't have to find people all that extreme to start finding antisemitism though. It's as common as openly racist people. Jews also play a special role in racist mythology, so anti-Jewish racism is weird and different from others.