The reason I posted originally was thinking about how some Protestant sects instruct people to "let Jesus into your heart to live inside you" or similar. So implementing a deity via distributed tulpas is...not impossible. If that distributed-tulpa can reproduce into new humans, it becomes almost immortal. If it has access to most people's minds, it is almost omniscient. Attributing power to it and doing what it says gives it some form of omnipotence relative to humans.