This is probably not the only theory, however.
This belief system is widely used by practitioners of chaos magick, due to their practice of adopting a religious aspect and believing in one god (or spiritual being, fictional character, whatever the chaote chooses) for a particular spell, then changing aspect for a new spell.
"I take no religious path, although I am a spiritually conglomotheist."
"Ah, I'm a christian."
"In that case, please take your retardation elsewhere."