It's allowed as long as no one breaks the specified rules found at the top of the page. Our sister forums such as dodgeforum's Off Topic section is loaded with political questions all the time and many times religion is there as well. Religion is allowed, Jeremiah got permission when he started the popular Point Man thread. It was understood that if you didn't want to read it, you didn't have to.

I normally prefer to keep away from politics as it can make things unfriendly and can turn people who would normally be best friends into bitter enemies. I don't talk about many of my political beliefs in great detail because I would probably turn about 70% of people here off if I did.

I don't think that we have been unfair to those who don't believe. If you don't like it, you don't have to read it. The only thing that we have stopped thus far was when someone was posting inappropriate material for general audiences because that directly violates the rules.