The christian God is the Sun, they of course don't know that, but it is!
It all came about with the Egyptians who believed that a certain other God eat the Sun at night and passed him out via his backside at Sun rise! Which if anything goes to prove that that race didn't come from space!
One of them came up with the idea of one true God, but others hated him for doing away with the multitude of gods they had. So when he got the chop, they went back to them, banned the one true god story. But you can't keep a good thing down, so slaves and some others kept the idea going. However many years later they only knew the idea of "one true god" plus he shines his light on everyone. Many 1000 years later the old city of the one true god was found, to reveal it was the Sun who they worshiped. By which time the "one true god" had developed into the christian religion.
While I am prepaired to believe there could well be life on other planets, I don't believe for moment that they have come here in the past or present.
If any of the unexplained things connected with UFO are true stories, then they are probably to do with humans from Earth, perhaps from the future. This would explain why they avoid full contact. For example the funny looking alien (from the above pictures) could well be what humans might look like in the future. And if you look where these craft turn up, it's in places of historical interest, or along coast lines, plus buzz aircraft!
Precisly the places and things that would interest future people.
Education for anyone aged 12 to 16 has made a mess of the world!