Yeah, I grew up Baptist as well, and Catholicism was a cult. Praying to Mary and needing humans to talk to God, extra books of the Bible and all that. It is surprising that fundamentalists aren't batting an eye at Santorum's religion.
I just can't see my grandparents voting for Romney. They sure as heck aren't going to vote Obama. I really believe that there will be a 3rd party candidate... I don't think it will be Santorum because of the implications it would bring to his career, but somebody will pop up for people who won't vote for Romney due to his religion.