What are y'all talking about? What backlash against Christianity- what backlash against the church institutions? From what I've seen of America, it's still quite Christian and quite evangelical, and I think if you did a poll, you would find that quite a few people are religious and go to church.
How are they on the defensive? They have a president; evangelical numbers are strong enough to boost Huckabee (considered a non-contender by Republican insiders) into a good showing- etc.