It wasn’t just anti-conservatism, it was a sort of an anti-country-club thing. There was a time when republicans had an image of country clubs which Jews were not allowed into, cigars, golf, poker parties, banking and railroad board meetings, and that sort of thing.
When the socialist party is getting 38% of a group’s vote in the United States, then I would say that group is a little more than anti-country club, Democrat would have sufficed for that.
The fact is that it is a perfect uninterrupted record, so to try and come up with excuses doesn’t work, pre depression, post depression, pre Hitler, post Hitler, pre war, post war, pre Reagan, post Reagan, pre 1960s, post 1960s, pre Israel, post Israel, nothing changes their vote, so no explanations about a temporary period mean anything. It is a pattern carved into stone.