"The voting patterns of Jews are not much different than Roman Catholics."
Well, actually, Catholics split about 50/50 down the partisan divide in their voting patterns. Jews split about 80/20, so they're not really like Catholics. Jews vote more like blacks - very consistently and lopsidedly Democrat.
Not really:
http://www.usatoday.com/news/nation/2004-06-02-religion-gap_x.htm
You also have to be aware of the polling --- much the recent polling was using Jewish-according-to-Hitler (e.g., a grandparent or "Jewish" last name), not whether someone was an observant Jew.