The Nephilim, mentioned briefly in Genesis 6:1–4 and Numbers 13:33, are among the most debated figures in biblical study. According to BibleAsk, the most prominent scriptural explanation is known as the "Sethite view." In this perspective, the "sons of God" refers to the godly descendants of Seth, while the "daughters of men" represents the ungodly lineage of Cain. The Nephilim were not supernatural visual hybrids, but rather powerful, tyrannical, and influential men of renown who arose when these two human lines intermarried, leading to the moral corruption that eventually brought about the Flood.
Another common perspective interprets the phrase "sons of God" as fallen angels who intermarried with human women, resulting in physical giants of great stature. This interpretation is widely expanded upon in ancient non-canonical writings like the Book of Enoch. However, mainstream biblical analysis on BibleAsk highlights that the Hebrew root word for Nephilim (naphal) translates to "to fall," indicating that these figures were spiritually fallen men who used their power for oppression rather than literal angel-human hybrids.
For a deeper look into this topic, you can read the full article titled "Who were the Nephilim?"
I go with the "Sethite view" because we already had angels mentioned that guarded the gates of Eden with flaming swords and because there WERE tyrant bullies controlling people all down through the ages that were very tall and average sized people in a large part of the OT eras. We still see very tall men & women that live among us, but they aren't as tall as the ones mentioned in scripture.
I do not accept the fables that sprouted from various authors in the past 100 years who promoted the ideas that the giants of old were hybrids; fallen angel & human who also tended to be hostile to most they confronted.
Adam & Eve were of a noble, lofty stature themselves and their DNA continued until around King David and maybe afterwards. We see evidence by a record of an iron bed (or sarcophagus) which belonged to a very tall man by the name of Og, king of Bashan [Deut. 3:11 KJV].
Some claim to have found the tombs of Goliath and his family and maybe several that belonged to other giants that once lived in the area Goliath's family occupied.
good