Honestly, I think that if we didn't fight over one thing, it would just be another thing.
As for the claims, it really doesn't matter whether he did it as a joke or was just writing a sci-fi. It's still a laughable idea. I mean, I get why many religious texts were written, from the Vedas to the Koran (and even a few that came later). Hell, even the Satanic Bible was an honest attempt at philosophy, although not without major flaws. But the story of an alien that decided to fuck over the galaxy and then vacuum up their souls and trick them with a variety of fake religions? I've heard better stories come out of a Thor comic book. Even the Mormons get more credit than these guys.