I find this argument to be almost humorous. Since when has "religion" had anything to do with the Jewish vote? The majority of Jews in the U.S. are not religious, and religion plays no part in the way they vote.
They see their Judaism as a social artifact; they consider themselves one more oppressed minority. Witness the almost rabid fear that the ADL whips up among its consitutency about "fundamentalist Christians" (the only consistently solid support, I might add, that Israel really has in the U.S.)
Jews tend to be liberal, period. I would venture to say that there are as many notable Jewish conservatives--not RINOs or neo-Cons but true conservatives like Michael Medved or Laura Schlessinger--as there are African-American conservatives.
And the GOP is just as likely in the near future to capture either of those demographics as the other.