I think you're only assuming that Chris' beliefs are only about him.
Chris has pretty consistently been telling people that there are higher truths to the universe, involving these stupid cartoon dimensions, and that people are shallow or naive for not considering them.
And I don't think you paid enough attention to the actual crazy shit that happened with Idea Guy. Chris wanted his religion to serve him, but he had to deal with the "reality" that it wouldn't. Like when Rosechu turned out to be a tranny. That burned him up. I'm still not sure where Chris sits with that.
There's plenty of existing human religions that are very similar to Chris' religion. Voodoo, wicca, various pantheistic religions. Shamanism especially. Chris' behaviors here are very similar to a lot of primitive people's religions. Just with a more obvious veneer of stupid because Chris sources his mythology from cartoons and not nature or whatever.