Furthermore, all important legislation is a reflection of morality. Liberals believe guns should be kept away from private citizens and they legislate accordingly.
I'd love to hear why you think abortion is particularly a matter of religion while slavery and segregation are not.
Legislating his Catholic religion would mean outlawing the eating of meat on Fridays.
pst: I think they dropped that, but man we used to get some good fish sticks at school every friday because of it.