I think that no candidate or president, should look or judge other people’s faith.
Faith, IMO, is a personal matter. Santorum, Obama&cohorts SHOULD stay out of it.
It would be great if it didn't need to become an issue...but it's going to as Obama arms up to make this election also about religion. In part because before you can build a "one world system" as the Un and National leaders are doing...you have to unite people spiritually...and before you do that you have to destroy what you can of the truth in order to replace it with a false religion.
So religion is going to become an issue, currently people are debating if or not should be which attests to the fact it is.