When considering the newer HEXACO model of personality traits that adds 1 to the Big Five, I think it's actually the H that is the big difference between whites and Jews and even whites and the Chinese. H is for honesty, integrity, and morality. Jews are incredibly immoral (brood of vipers as Jesus said), and it is difficult for white people to imagine that people would be so deceptive and manipulative and would cheat and collude so much. There also seems to be something that supports in group collusion, but I'm not sure if that's innate or just environmental (i.e. "We're poor, mistreated, persecuted Jews in a nation full of goyim who hate us for no reason. We've got to stick together to survive.").