Good day CSI,
See post #419. Regardless of your examples above, there is a grammatical distinction being made between mankind and the sons of God. The scripture infers that the sons of God are not mankind.
Genesis 6:1
"When human beings began to increase in number on the earth and daughters were born to them, the sons of God saw that the daughters of humans were beautiful, and they married any of them they chose"
Genesis 6:4
"The Nephilim were on the earth in those days—and also afterward—when the sons of God went to the daughters of humans and had children by them. They were the heroes of old, men of renown."
If "the sons of God" were also humans, the scripture would not be stated as it is, as it would be grammatically improper. It shows a distinction between the two. Below is Enoch's description of Genesis 6:1
"It happened after the sons of men had multiplied in those days, that daughters were born to them, elegant and beautiful And when the angels, the sons of heaven, beheld them, they became enamored of them, saying to each other: Come, let us select for ourselves wives from the progeny of men, and let us beget children.
As I said before, Jude quotes from the prophesies of Enoch and therefore validates his prophecies as being authentic. If fact when I read the prophecies of Enoch, rendered as Ethiopic Enoch, it reads like the word of God. The Spirit confirms the validity of these writing. In addition, Enoch used to be apart of the scriptures up to the 3rd century and gives much detail to the extent of corruption that these angels, the watchers of heaven as they were called, how they had corrupted the earth. Because taking wives from the progeny of men was not all that these angels had committed. For they taught mankind how to make swords, knives, shields, breastplates, the use of paints and dyes, the beautifying of the eyebrows, sorcery, the dividing of roots, signs, astronomy, the motion of the moon, etc., etc.
Moreover, the giants that resulted from the angels, the offspring of the watchers, were not just 20ft giants as some have suggested, but were 300 cubits tall according to the Enoch. And because they were out of scale to mankind, they devoured all which the labor men produced; until it became impossible to feed them.
It was because of what the angels, the sons of heaven had done and their corruption of mankind, that was the major cause of the flood. Noah and the flood is even mentioned in the prophecies of Enoch, being referred to as "the son of Lamech."
Regarding these sons of God, the angels, I believe that 2 Peter 2:4 and Jude 6 are both referring to those angels who took wives from the progeny of mankind. And because they took wives and corrupted mankind with their teachings, they were those angels that were cast down to Tartartus into chains of darkness until the great white throne judgment.