The problem is that most theists can't discuss things rationally. In another forum, a theist just said (in totality) "John something" as if that was proof I was wrong. No discussion, no explanation, just a quote from the very book we were arguing did not exist as proof of Jesus.
I don't understand these people. There is NO rational thought in any of them.
When they do attempt to engage, the discussion that ensues is a stew of confusion, a fact here, an wild assertion there, and a host of logical fallacies. If I let my mind become that disorganized, I would go crazy.
One way to deal with such chaos is to look for something that tells you it has all the answers and says, "Don't worry. There is a plan, and everything is under control." We hear this from politicians, dictators, priests, and televangelists (people who want to be recognized as necessary for your own personal well being). Religion is a defense against the chaos of a disorganized mind.
Try and have a debate with a theist, and if you can draw them out, you will see the chaos. It takes the familiar shape of a discussion the makes no sense. Faith in a god of some sort is the remedy they use to deal with it.