If these peace-loving aliens were a threat to anything, it was to theology. John Adams put his finger on the problem as a young man in a diary entry from 1756. Given the near-certainty of alien life, he reasoned, Evangelical Christians must either condemn our extraterrestrial brothers to everlasting perdition or suppose that Jesus shows up on an endless number of planets in ever-changing alien incarnations. Thomas Paine later made the same point in print, rather more caustically: “The person who is irreverently called the Son of God, and sometimes God himself, would have nothing else to do than to travel from world to world, in an endless succession of death, with scarcely a momentary interval of life.”There are a lot of sightings of strange objects in the sky. I often wonder if not only have we been visited by them, but if we are their projects. If they do exist and are visiting, it needs explaining why they aren't sharing their technology like zero point energy and cures for diseases like cancer. One reason is it would be too "disruptive." Likewise if they are that much more advanced then they have presumably knowledge of the origins of reality. That would disrupt or perhaps clarify "religion."
Perhaps the recorded miracles of old were simply uses of advanced alien technology. From Thor:
Erik Selvig: I'm talking about science, not magic.
Jane Foster: Well, "magic's just science we don't understand yet." Arthur C. Clarke.
Thor: Your ancestors called it magic...
[Thor skims through a book on Norse mythology]
Thor: ...but you call it science. I come from a land where they are one and the same.