This is true. But what is wrong with people wanting to be with their own kind? Now discrimination in public services is a different matter. And by the way, the Jews themselves can and are quite discriminating and clanish.
I dont know what country clubs you've been visiting, but I cannot recall any "old Northern establishment Republicans" who excluded Jews.
You could easily make that case about the Southern Democrats of old, and the Southern Democrats of today.
Or the left wing college campus's, every Democratic-leaning one of which drips derision and hatred for Israel and the Jews, even though many professors are Jewish.
Or do you recall the blame W.Virginia Rep. (Dem) Jim Moran put on Israel for the world's ills not too long ago.
And dont get me started about the die-hard union Democrats, whom continue to this day to resent and disparage Jews, especially rich Jews.