Suddenly dropped by guy I was dating?

I've been dating someone for about a month. Things had been going extremely well. We hit it off instantly, had the same values, interests, goals, etc. I mentioned that my birthday was coming up and told him all I wanted was to take a drive somewhere to see the fall foliage. He told me to keep my weekend free and he would plan something. He ended up driving me out to a beautiful little B&B in the mountains and got a room with a fireplace. We had a great dinner, laughs, etc. All I could think was how lucky I was to have found someone so thoughtful. On the drive home he brought up a subject that he had mentioned briefly a few times. He said he was looking to get back to church and that it was very important to him as he was a Christian. I told him as I had the other times that I considered myself spiritual, not religious. He started to become very heated in the discussion and told him that that was what he believed and he wanted to know point blank what I believed and if I was a Christian. I became very uncomfortable and asked to change the subject, but he kept bringing it up to the point where I asked him if he still wanted to continue to date me. He told me he didn't think he could and he was driving me home. I was shocked, hurt, confused. This came out of no where. I even noticed that the dating profile on personals where we met became active again that same night and he had deleted all my emails. I am still reeling from this. I don't know what to think. The only other thing I can think of is that he mentioned he was taking Depakote. When I googled this I read that it's a medication for epilepsy and bi-polar disorder. I don't know if this has anything to do with it or not... but I'm so hurt and confused. Your thoughts?