Now here is an interesting survey, and its summarized in the pie graphs below:An intelligent if somewhat academic discussion ensues on Crooked Timbers, with a certain amount of shock and disbelief among progressives there. A lot of questioning of methodology and so forth. One commentor ventures the following rather strong statement:
Here is an entirely sober, but also very politically incorrect, opinion: a large fraction of this discrepancy between Democrats and Republicans can be explained by the significantly larger fraction of Democrats who are black. There is a strong, persistent, and relatively unabashed level of animosity in the black community toward Jews. (The animosity flows the other way, too.)
I find it telling that, despite discussing cross-tabs on educational attainment and party affiliation, the article never once dares to mention race.
One theory I occasionally entertain is that 9/11 brought about a sea-change in attitudes towards Israel and the Palestinian resistance, and this has had a spillover effect on attitudes towards Jews in general, primarily among the American/Canadian Right.
Before that date it seemed easier to argue that the Palestinians were entitled to their intifada, even when this involved the employment of suicide bombers. Afterwards, after being on the other end of a series of suicide attacks, a larger segment of the U.S. Republicans (and maybe Candian Conservatives?) are likely to have a visceral, negative response to such arguments. Pro-Israel sentiment has therefore generalized to Pro-Jewish sentiment.