Kaon do you believe as written in Enoch that these offspring were 450 feet tall and ravished the planet eating everything in sight creating famine and war amongst normal sized people?
That God sent the flood to drown them and since they were hybrids their spirits have been allowed to remain on the earth as evil demons?
Enoch was simply one explanation of Genesis 6. Julius Africanus a man familiar with jewish thought writing in 180 ad wrote gave the 2 most notable opinions:
When men multiplied on the earth, the angels of heaven came together with the daughters of men. In some copies I found "the sons of God." What is meant by the Spirit, in my opinion, is that the descendants of Seth are called the sons of God on account of the righteous men and patriarchs who have sprung from him, even down to the Saviour Himself; but that the descendants of Cain are named the seed of men, as having nothing divine in them, on account of the wickedness of their race and the inequality of their nature, being a mixed people, and having stirred the indignation of God. But if it is thought that these refer to angels, we must take them to be those who deal with magic and jugglery, who taught the women the motions of the stars and the knowledge of things celestial, by whose power they conceived the giants as their children, by whom wickedness came to its height on the earth, until God decreed that the whole race of the living should perish in their impiety by the deluge.