Somebody wrote an essay a couple of years back, that what you noted is why WASPS still have a leg up in getting elected POTUS, even as their percentage of the population slowly shrinks. WASPS have more religious "freedom" in a political sense. They have so many sects to choose from, or can just be deists, and few really mind, because they are not violative of their declared faith. They can't use the "a" word and get elected though, in most places, even if an adjective is appended.
Yup, I think that's true. The point I was trying to make about Rudy and Catholics is that a large majority of pro life Catholics were Reagan democrats who have made the switch, they now vote in Republican primaries. And they vote their because of the social issues. Your point is a good one that puts emphasis on why I don't think Rudy can beat McCain.