Race42008 has some more info on some of the backers of the ad opposing Mitt Romney as McCain's running mate.
Read their track records. Then ask for yourself if the objection is really about social liberalism, or if it's because he is Mormon.
Because I know what this looks and sounds like to me. So, do I believe the protests of people like commenter FreedomFighter in a previous post on that ad, or do I believe my own eyes?
UPDATE: More discussion at Townhall.
UPDATE 2: Redstate commenters blow off concerns about the ad.