Rolling Stone writer Matt Taibbi hung out with true believers of the “Christian Right” until Jesus Made Me Puke, and toward the end of the article her sums up his experience:
By the end of the weekend I realized how quaint was the mere suggestion that Christians of this type should learn to “be rational” or “set aside your religion” about such things as the Iraq War or other policy matters. Once you’ve made a journey like this—once you’ve gone this far—you are beyond suggestible. It’s not merely the informational indoctrination, the constant belittling of homosexuals and atheists and Muslims and pacifists, etc., that’s the issue. It’s that once you’ve gotten to this place, you’ve left behind the mental process that a person would need to form an independent opinion about such things. You make this journey precisely to experience the ecstasy of beating to the same big gristly heart with a roomful of like-minded folks. Once you reach that place with them, you’re thinking with muscles, not neurons.
I’m no expert, but it seems as obvious as an obvious thing can be that, once you’ve completed your break with objective reality, you’re dwelling in Serious Mental Illness territory. And at that point, even if you elect not to seek professional treatment, you really need to stop trying to make other people’s public policy decisions for them.