The term "sons of God" denotes a special act/offspring of God whereby they are above the carnal fleshly earthly existence.
That was the true Light, which lighteth every man that cometh into the world. He was in the world, and the world was made by him, and the world knew him not. He came unto his own, and his own received him not. But as many as received him, to them gave he power to become the sons of God,
even to them that believe on his name: Which were born, not of blood, nor of the will of the flesh, nor of the will of man, but of God.
Behold, what manner of love the Father hath bestowed upon us, that we should be called the sons of God: therefore the world knoweth us not, because it knew him not. Beloved, now are we the sons of God, and it doth not yet appear what we shall be: but we know that, when he shall appear, we shall be like him; for we shall see him as he is. And every man that hath this hope in him purifieth himself, even as he is pure.
Sons of God took the daughters of men = CLEAR distinction between two separate entities of God's creation.
AFFIRMED to us by Jude
I will therefore put you in remembrance, though ye once knew this, how that the Lord, having saved the people out of the land of Egypt, afterward destroyed them that believed not.
And the angels which kept not their first estate, but left their own habitation, he hath reserved in everlasting chains under darkness unto the judgment of the great day.
Even as Sodom and Gomorrha, and the cities about them in like manner, giving themselves over to fornication, and going after strange flesh, are set forth for an example, suffering the vengeance of eternal fire.
For if God did not spare the angels who sinned, but cast
them down to hell and delivered
them into chains of darkness, to be reserved for judgment;
and did not spare the ancient world, but saved Noah,
one of eight
people, a preacher of righteousness, bringing in the flood on the world of the ungodly; and turning the cities of Sodom and Gomorrah into ashes, condemned
them to destruction, making
them an example to those who afterward would live ungodly;
Now it came to pass, when men began to multiply on the face of the earth, and daughters were born to them,
2that the sons of God saw the daughters of men, that they
were beautiful; and they took wives for themselves of all whom they chose.
And the Lord said, “My Spirit shall not strive with man forever, for he
is indeed flesh; yet his days shall be one hundred and twenty years.” There were giants on the earth in those days, and also afterward, when the sons of God came in to the daughters of men and they bore
children to them. Those
were the mighty men who
were of old, men of renown.
Then the Lord saw that the wickedness of man
was great in the earth, and
that every intent of the thoughts of his heart
was only evil continually. And the Lord was sorry that He had made man on the earth, and He was grieved in His heart. So the Lord said, “I will destroy man whom I have created from the face of the earth, both man and beast, creeping thing and birds of the air, for I am sorry that I have made them.” But Noah found grace in the eyes of the Lord.
Fallen angels came to earth to pollute the human genome in an attempt to prevent the bloodline of Messiah = Immanuel = God in Man.
They came within eight individuals of completing their plan of corruption.