Israel is a homogenous country of intelligent people. The U.S.A. Isn’t anymore.........!
http://en.wikipedia.org/wiki/Demographics_of_Israel
Israel may have a Jewish majority, but as far as ethnicity goes they’re a lot more diverse than we are. I worked for an Israeli company and probably no two were exactly the same ethic makeup. (Although it may also be that recent émigrés were more likely to accept posts in the USA.) The ones I met came from all over Europe, Russia, the middle east and parts of Asia as well as different locales in the USA. I didn’t meet any black Israelis but there are quite a few.
As for their common Jewishness I can tell you that what it means to be a Jew is different among the ones I knew. They were as different as Catholic is from fundamentalist Christian or Mormon. Politically, though, the ones I knew were so far left that that many were outright communists. From that perspective the ones I knew were much more homogenous in their (indoctrinated) thinking. Incidentally, the dual citizens vote in elections here and as near as I could tell never voted Republican. The Dems could run an orangutan and they’d vote for him.