I'm not religious (although I'm on the right), but I think the question of god is not so simple. Metaphysics is very subtle and although I feel like I've arrived at a fairly solid conclusion (determinism, Sam Harris style morality, science-based) it's not that easy to write off god-believers as total idiots. For people who fully swallow the bible I can agree with you. But for the rest who kind of believe in god or are not that interested in metaphysics I'd say it's harder to discount them so easily.