Is it self-hatred? You’d think the Holocaust would have taught them something. - Daddy was in Germany in WWII; spoke of the piles of bodies several feet high for a quarter of a mile at one of the camps. When his outfit learned from their superior officers what Hitler was doing to the Jews; they began fighting even harder, as hard as they could to get to them, to get to Germany, to ram Hitler’s hate up his nose. . which they did. Daddy’s bunch marched into Berlin about half an hour after Hitler had taken the coward’s way out - before they could break in & haul his carcass into the street.
Sadly it is actually probably because of Hitler and past persecution. Jews tend to believe that an all powerful state will protect them. You won’t read this in most history books, but it was not difficult for Hitler to persuade people that Jews were associated with communists throughout Europe. Most of course weren’t, but a disproportionate number weighed against their overall population either were communists or, most often, sympathetic to that movement (or trade unions, democratic socialists, etc). Additionally there are a lot of secular Jews who are very politically active and almost always on the far left. It is no accident that you see so many Jews in groups like the ACLU and People For the American Way. Sadly it is those groups far more than Muslims, Hindu’s, etc, that are constantly trying to remove nativity scenes, etc.
I admire Israel and Israeli Jews for what they have achieved against all odds, but Jews outside of Israel are pretty overwhelmingly leftists and I don’t believe for one moment that Republicans are going to win that particular voting block. They will vote 75% or so for Hillary - maybe more if it is Bernie Sanders who gets the nod on the Democrat side.