Eh, in my opinion it's a bad idea to have any form of religious subforum on any site because of the fact that the internet is a melting pot of cultures. If you have a special spot for one religion, others will want it, then inevitably you'll get people who are against having other subforums for differing religions, then shenanigans ensue followed by bannings of several members because they couldn't get along.

People always do it. "My religion is superior to 'other religion' and you know it", "Your religion is full of crap.", "I can't believe you'd worship that", Etc. Etc.

From what I've seen, this seems a good community, so this may not happen, but everytime I've seen a religious thread on any other forum I go to it usually ends in a flamewar, someone getting warned/banned and a lot of people getting mad at some guy on the internet. I haven't went into the Christian subforum so I dunno how well it works here, but having mixed religions is usually a bad idea and only having a place for one in specific to be talked about is an even worse idea.