Interesting concept.
You said — “Interesting concept.”
It’s really been a long-established idea in the Christian community, and not a “Johnny-come-lately” one...
I’m talking about the connection between the supposed “alien sightings” (of craft and/or any other kind of supposed “alien” interaction). There has always been a “religious nature” to a lot of this, which has been peculiar, in a simply secular sense, but not peculiar if you connect it with the evil and fallen angels.
But, the connection for the fallen angels cohabiting with women on earth is an idea that has *very long standing* — going back millennia and continuing into the present, with Christians. Although there are Christians who totally reject this — it’s because they *can’t stomach* the very idea itself and it’s too repulsive to them, and so they *invent* all sorts of contorted ideas (from the text) to say *anything* — other than what the text of the Bible says about this.
It’s not new... definitely...
Read the Book of Enoch (available online) and then reread Genesis 6 and the Book of Jude.
Enoch (though pseudepigraphal, it was found with the Dead Sea Scrolls) sheds a lot of light on the canonical books.