There may be people living on other worlds, but if there are we don't know anything about them. Myself, I take for granted that they would have cultures and histories and fateful blind spots, just as we do. Of course, I could be wrong. But any statements or representations of them are fictional, "fairy tales" as the village-atheist meme has it, where someone projects his or her opinions onto them and gets them back endowed with authority. They can fairly be called "religious." It's completely normal, but the people who invent or share such memes believe that they're enlightened, superior to the gullible masses. On the contrary, they are part of the masses.
That's basically it. I might explore its implications some other time, but this will do for now.