I'm always struck by why Jews tend to vote so strongly Democratic when it is quite clear that Democrats are far from fond of Israel.
I remember about 10-12 years ago or so, Rush Limbaugh had a caller ask him that question. Rush said, "Because they're liberals first and Jews second."
Why should American Jews care about Israel? Israel is simply a country, not a religion or an ethnicity, no matter how much it pretends to be. It can not speak for all Jews and Jews are under absolutely no obligation to show any loyalty towards it.