Well, I doubt Foster could sustain this appeal to a purely "natural," primitive belief system since then he'd have to defend rape, racism, sexism, and any other antisocial inclination we're predisposed to have because of what's natural (genetically determined) for humans to think. No, we don't want to be entirely natural unless we want to give up on civilization and go back to being nomadic hunter-gatherers.
So there's plenty of hypocrisy in Foster's liberal Christianity, if only because his stripped-down "religion" ends up being practically equivalent to secular humanism, as I've argued elsewhere.
Anyway, he's saying that theism is part of the natural human way of thinking. And I'm agreeing with that, for the sake of argument, but I'm saying it's natural for us to commit fallacies, such as the overuse of the intentional stance (the personification of inanimate objects, etc).
