So what? That doesn’t actually answer any of my questions, and besides, such children wouldn’t be any worse of an abomination than the unbelievers who already existed, so why would it be noteworthy?
How about answering just one question, though. If “nephilim” wasn’t understood to mean literal giants, then why in Numbers 13:33 do the Hebrew scouts tell David that they saw “nephilim” in Canaan who were so large regular men were like grasshoppers compared to them? We later meet some of these sons of Anak in Canaan and they are indeed described as men of giant stature, such as Goliath, so we know the description is not simply figurative.
The average height of the Hebrew Israelite, in this time period, was about 5’4. If they came across some a people averaging 6’0-6’4, because they were healthier, they would think that they were meeting giants.
There are a few alternative modern theological proposals, and mixes could be possible too.
Any human giant that lived after Noah would have to be a physical descendant of Noah. But what else influenced this giant, is something we don’t have enough detail to pin down. More and more I am finding the demonic to be a credible factor in human history. Where that operates, we will find wickedness that seems beyond reason.