If you want to call anything that did not originate on earth an ET or alien, than you must assume that the various ET entities from the bible such as the Nephelim, giants, angels, cherubim, hosts, and Sons of God were all ETs.
It is said:
In Genesis 6:04:
”The Nephilim were on the earth in those days, and also afterward,
when the sons of God came in to the daughters of men, and they bore
children to them. These were the mighty men that were of old, the
men of renown.”
The Nephelim, alleged inhabitants of Atlantis, lived before and after the flood. The proof of this is when in the bible it says what it says in the quote i wrote. the genesis book was written after the book of Job which was the oldest bible book. now, the author of the genesis book was writing let's say around 1500-1000 BC, well it would be apparant that the Nephelim, sons of God and giants survived the ancient floods that wiped out most of them. also, the skeletons found of some of the giants corroborate the story.
anyway, my point is, ETs dont neccesarily have to be just the infamous anal probing greys...there's many more because in i think Corinthians, it is said that God will call out to races all over the universe that serve him and they will do battle alongside Christ in the planet earth's last days..an obvious ET reference
bah...its all jumbled up because im writing off the top of my head but trust me it makes sense i could write it much better but typing, even at this rate of 200wpm is too damn slow =/