If a Wiccan was attempting to become canonized within the Catholic church, or become the Pope, I would oppose such a move.
If they're the best candidate running for a governmental office, though, their religion doesn't bother me.
Same thing goes for actors and musicians spouting nonsense about their political beliefs. I pay them for their entertainment value, not their stance. I like U2's music, but I almost never agree with their political motives.