You are not asking me but I am responding, honored as I am to be included in your post.
Inasmuch as the Word tells us there are two kinds of created beings, angels and humans, and the aliens are manifestly deceptive, then any alleged ‘aliens’ would have to be fallen angels.
Quite plausibly. Certainly I believe that the critters known and written about the last 60+ years are fallen angels.
However, I do not believe that Scripture expressly limits God’s created beings to angels and humans.
Perhaps you meant sentient created beings.
Even there, I don’t believe Scripture expressly limits God’s created beings to angels and humans. It may be. It is hazardous to argue from silence. Scripture is silent on the issue in terms of anything clearly applying to the issue.
Thank you! That made a lot of sense. I would agree with your point that if aliens who come (and I don’t believe there are any aliens or even manifestations of them) are manifestly deceptive, then they must be fallen angels