I don't think there's anything wrong with this kind of religion-based identity politics. It certainly doesn't appeal to me, and it isn't designed to. But it isn't in any way outside the rules which our grand and glorious Villagers set up until they decided they didn't like Mike Huckabee.
To be clear, I'm not saying you have to like this stuff, I'm just saying that I don't think it's in any way out of bounds. We've been told for years that politicians should embrace religion, and now a couple of them have in a very explicit fashion. Like any identity-based tribal politics, as a strategy it runs the risk of being exclusionary. And I'm much less likely to push the Obama button in April because of it. But it isn't somehow wrong. In fact it's much better than the be-very-religious-without-any-actual-religion "faith based" rhetoric we previously dealt with. If you think religion is important, and you think voters will respond to that positively, run with it.