I’ve heard different theories on why the Jews vote Demoncrat - 1) They were born in America and have no national ties to Israel as their home country and 2) Evangelical Christians support Israel and the Jews don’t want anything to do with a group that promotes Jesus Christ as the Messiah.
I worked with Jewish guy that was a communist. His parents were communists that migrated over from Russia and worked with the labor unions here to transform this country.