Well, the Jews in Israel learned, the Jews in this country are another matter.
Year after year they vote like lemmings for the party that continually gives aid and comfort to their sworn enemies.
So much for learning.
I suggest you look at the history of Jews in Europe. They were prevented in many places from owning land or from participating in most professions. They thus tended towards political thinking that most of us would consider radical and socialism is very popular among many Jews.
Jews have experienced bigotry in this nation, being excluded from business clubs and even golf clubs. Some of the famous golf clubs in southern California were started by Jewish movie stars, such as Groucho Marx, who was prevented from joining established clubs around Los Angeles.