Religion doesn't seem to lead to the kind of ongoing vicious exchanges that two-party politics usually does so there's never really been a need to step on that branch of debate. But yeah, if it starts to turn into some guys yelling about theocracy or the legislation of morality, it would probably be frowned upon.
And don't worry about the mods, we're a pretty benign group until a guy becomes a regular repeat offender after being asked to knock it off a couple times. You have to make a pretty concerted effort to get in trouble around here, and if you do then it's not really a problem because you've just gotten exactly what you wanted anyways.