[rayiner]

Religion is a red herring in the abortion debate. Abortion is illegal in Poland (Catholic) and Bangladesh (Muslim), and is technically illegal (though available) in Japan (Shinto and Buddhist). Regulation of abortion is therefore not something specific to a particular religious tradition.

In the U.S. specifically, moreover, abortion is best described as an internecine conflict between different branches of Christianity. The pro-choice movement is an outgrowth of mainline Protestantism, with its focus on individual self determination. The notion that the morality of extinguishing a fetal life "is between a woman and her doctor" and society has no say is uniquely Protestant. It's quite alien even to other societies that permit abortions, which tend to do so on utilitarian grounds like overpopulation.

And all that is fine, because "separation of church and state" does not mean that the government cannot regulate behavior "based on religious beliefs." The U.S. does not have French-style secularism, where there is a separate body of secular philosophy animating government and religious belief is actively excluded. It doesn't matter what people's reasons are for voting a particular way, as long as the end result is otherwise permissible.