I believe He had a good reason for destroying these peoples. They had been compromised by the blood of the fallen. Their descendants were half Nephalem. They had to go.
Interesting, but things reproduce after their own kind, no?
Now, perverted men/women and all, I get it, but copulation and genetic reproduction by fallen angels ( demons- spirit beings who can assume a temporal form) and womankind? Violates the laws of God and God’s nature. See Gen. 1, law of first mention.
I doubt even a tiniest fraction of those commenting on this thread, have a clue. Those that do, in majority, would never ever acknowledge. Now the biggie is that those 'children' brought out of bondage, itched, whined, moaned, and built themselves a 'golden calf' to worship... Nothing new under the sun, as the acts of the Old are repeated today in real time.