You're just confirming what I'm saying. 19/20th century antisemitism was based on pseudo-science (that started long before Nazis, they just "perfected" it, which is what Euros want you to forget), just as anti-black racism was also based on pseudo-science at the same period. Before that it wasn't based on pseudo-science, but on religious/cultural bs, for the simple and quite obvious reason that science didn't have such a prominent role. Hatred adapts to circumstances, I think anyone can understand that.
And what I mean by "antisemitic since forever" is that Jews have been ostracized since forever in Europe. Sometimes more violently than others (obviously, otherwise they would have been long gone). And that happened all over Europe. Russia, Ukraine, Poland, Germany, Italy, France, Spain, etc. It's no "master conspiracy", it was just widespread prejudice. Similar to what's happening to Muslims now all over Europe, the prejudice and discrimination are widespread. Not sure how anyone who knows anything about European history can deny that
When you say that anti-black racism is ingrained clearly in the same belief (biologically and morally inferior), same can be said for Jews. It's been clearly ingrained that Jews somehow "control everything", are "close to money", "not to be trusted", etc. And of course pseudo-science also put them in a biologicaly inferior position to White people, that only changed post WW2.