Typical New Age stuff.
Lemuria, Atlantis, civilizations made by the aliens. We are supposed to be alien crap. Everything they can say to deny that God created man.
And then one day they come back to say they have come to help us and that we should worship the antiChrist. Hmmm...their plan is SO obvious.
Satan and the angels were created before man, but they were on their own.
It is possible that ancient people had the help of demons to build batteries and silly stuff like that, but God wouldn't allow anything that could compromise His plan for us. Just remember the Bable Tower story: a good example that nobody messes with His plan.
Seemed the story to me...just pray the bit about, the aliens incognito aren't fallen angels, or we are in for some interesting times....