I will be visiting my (Jewish) relatives in the NYC area in a couple of weeks and will be very interested to see if their views have changed at all in the past few months. As a conservative, I’m definitely one of the black sheep of the family (but not the only one), and I have often had to bite my tongue so hard at family gatherings that it nearly drew blood. My mom, however, cannot stand Obama - she genuinely thinks he’s a Communist, and I quite agree. She traveled to Israel last year for the first time, and reported back that the anti-Obama sentiment is almost universal. They cannot understand how Americans could be so stupid, especially American Jews.
You'll find that except for the real radicals (who have a very self-serving agenda), most of them don't know very much about American politics, political history, economics, and economic history. Unfortunately, there is particularly great ignorance about Franklin D. Roosevelt, his somewhat subtle antisemitism (including his refusal to admit a shipload of German Jewish refugees desperately trying to escape Nazism), and his role in extending the Great Depression. Roosevelt has been built into a false icon through the generations in too many Jewish families, which serves as a phony basis for a continued loyalty to the 'Rat party.
I'm very well aware of the anti-Obama sentiment in Israel. Even in the 2008 election, before he had any influence on Middle East policy, Americans abroad in Israel voted about 75% for McCain. It's a different world there when you have to live in a neighborhood surrounded by violent enemies.