You have to be a little bit nuts to begin with if you want to believe in a man in the clouds, comes with the thertory of religion.
By your definition most of humanity is crazy then. I dont believe in a childish notion of god, but we grow up with this stuff, its in the waters so to speak, so its not all that crazy to believe in it. This guy has very freakish self loathing beliefs, and the way he expresses himself he just comes off as crazy. Its actually fascinating to see the variety of crazy thats out there that you get much more exposure to thanks to the internet. Its a humbling look into the non rational side of humanity, which in conventional thought is basically ignored.