Regarding that Revelations bull shit .. Send him this list and gently ask him to read it from a logical point of view. Than tell him that you sent it to him because you don't want him to make choices based on the emotion of fear. Which would be the truth. I don't want my son to make life long decisions based on any emotions. Rather, well thought principles.
http://atheistforums.org/thread-12642.html
http://atheistforums.org/thread-12642.html