>>Are you thinking that religious people think the human beings inhabiting this planet are all of God's creation?<<
They did when the religion was invented, and Earth was the center of the universe. Now, we know it's not.
I think they believe they are God's children, created in his image. I doubt aliens look like us. .It sounds like your ready to join the 'Prometheus' religion, not the Christian religion!
I think it's much more plausible than Christianity too, although total fiction. Scientology is as plausible as Christianity!