The only thing to really argue about is whether or not you require evidence for your beliefs, or whether you take things on faith.
You simply can't argue religion from facts, because religion is bullshit. The only way to be religious is to convince yourself it's not bullshit, and the only way to do that is to not require ample evidence for your beliefs.
By the way,
www.talkorigins.org is a wonderful resource for this subject.