Would there be less uncertainty about any God's existence if it was made clear in ancient times that he or she was an outer space alien?

What if Jesus or any other God clearly indicated that he was from a creator race of superior aliens from another planet in a far off galaxy? And that as our God, he wanted us to live peacefully with each other for a few thousand years until his return where he would then share with us the knowledge of how to live longer if not almost forever.