I'd suggest that SC is not the most pious of all the states, and these people may want to start in Mississippi, Alabama, or Kansas; states that are already primed for theocracy. You can't move enough people into a state to reform their political ideals, as such you need a good base of religious nuts already in the state. While my home state has it's share, it's not nearly enough to base such an ambitious undertaking.
It would be a shame to watch my state slip into such a pit of ignorance and despair, but like the above poster, I really really don't think it will happen.