Unfortunately, it's not a wind up, and he's not a nutter (well not too much); he's just got a different way of looking at life, and he's reached a set of beliefs that for him, have a degree of truth about them. Unfortunately, it's not a truth that many others will share.
I can guarantee that if I shared my view of the universe with you, there are many on here that would call me a nutter, but that's only because they haven't seen the things that I have. In the same way, we haven't seen what that guys been through, or we might agree with him.
Actually, have read more of the post, I think he's a nutter; but he's entitled to be.