He got 78% of Jewish vote in 2008 and now has a 60% approval rating. That’s an 18% drop then way I look at it. Anyway the blind support comes from what I cal JINO’s, Jews in name only.
Another way to look at it is that 18% of the people who voted for him are unhappy because he's not sufficiently Leftist. Just because some people are unhappy with him does not mean that they will vote Republican in 2012.