I really need to watch it again, but right now I'd say his meticulous definition of terms from all possible angles is the key to unlocking points of debate on those items I lsted above.

For example, he believes the Nephilim are not the Watchers, who are not the Giants. Also, he points out that the "sons of God, daughters of men" were not cases of rape but voluntary arrangements by both the women and their fathers. They knowingly interbred with non-humans.

He believes that the phrase Jesus used in Mat. 24 as one of the conditions for the end times, "marrying and giving in marriage", is a rarely-used expression for these very kinds of interbreeding, not normal human marriages.

The lecturer also explains that many of the nations God had Israel wipe out were composed of hybrids. The back drop is that when God scrambled the languages of people at the Tower of Babel, he defined the limits or borders of their lands "according to the number of the Sons of God"... NOT the sons of Israel, as some translations render it. In other words, God was saying to the world, "You want to worship these 'gods'? Fine. I will lay out their lands and you can serve them instead of me. But I will reserve a land for myself, my people, Israel."

This is why they are the "chosen people" and why they had to remain separate. This is why the other nations, ruled over by malevolent entities, have always sought to wipe Israel off the map. And this is why those who give their allegiance to malevolence are always at odds with anyone who gives their allegiance to God.