Personally, I think you should try something of this order on your friend but only if you're willing:
"How about we talk about proofs for the existence of God/the Bible and the problems with them. If your faith is true you should not fear scrutiny and investigation because it will hold up to it but if it is false it will crumble away. Since you are certain of your faith there should be nothing to fear."
Of course that would require you to talk about the issue which again I am sure not you want to do. People wanting or not wanting to discuss atheism/religion is their personal preference. I just happen to be one of those people very interested in curing people of the "poison" so to speak. Again I don't think it is wrong of people to just not want anything to do with the discussion.
If you don't want to discuss it with your friend and you want to close that door I suggest you just tell him "We are not going to discuss this again unless I change my mind." If that ends your friendship then so be it, I know that may suck but sometimes it just has to be that way.
"How about we talk about proofs for the existence of God/the Bible and the problems with them. If your faith is true you should not fear scrutiny and investigation because it will hold up to it but if it is false it will crumble away. Since you are certain of your faith there should be nothing to fear."
Of course that would require you to talk about the issue which again I am sure not you want to do. People wanting or not wanting to discuss atheism/religion is their personal preference. I just happen to be one of those people very interested in curing people of the "poison" so to speak. Again I don't think it is wrong of people to just not want anything to do with the discussion.
If you don't want to discuss it with your friend and you want to close that door I suggest you just tell him "We are not going to discuss this again unless I change my mind." If that ends your friendship then so be it, I know that may suck but sometimes it just has to be that way.