God was moved to anger at these Watchers, because of the horrible practices that they had introduced upon the Earth.
And there was something else: God was angry at the fact that they had disclosed certain secrets, and were teaching them to their sons, the Nephilim. We are not told exactly what these secrets were, except that they were "eternal secrets" which men of Earth were striving to learn, and which God did not intend for fallen man to discover.
Things deteriorated rapidly, and soon the Nephilim were practicing the most repulsive and revolting behavior. They began to "devour one another's flesh, and drink the blood." This cannibalism shocked even the depraved citizens of Earth, to the extent that they brought accusation against the Watchers.
Enoch is instructed by the Most High to deliver this warning to the Watchers:
"Enoch, thou scribe of righteousness, go, declare to the watchers of heaven, who have left the high heaven, the holy eternal place, and have defiled themselves with women, and have done as the children of earth do, and have taken unto themselves wives: 'Ye have wrought great destruction on the earth: And ye shall have no peace nor forgiveness of sin.'"
These same Watchers in turn approached Enoch to mediate on their behalf, and to write out a petition in their favor.
God, however, rejects the petition and Enoch is summoned to speak to the Watchers again:
"Go, say to the Watchers of heaven, who have sent thee to intercede for them: 'Ye should intercede for men, and not men for you. Wherefore have ye left high, holy and eternal heaven, and lain with women and defiled yourselves with the daughters of men, and taken wives unto yourselves and done like the child of earth and begotten giants as sons. And although ye were holy, spiritual living and eternal life, you have defiled yourselves with the blood of women, and have begotten children with the blood of flesh, have lusted after flesh and blood as those who do die and perish.'"
And as for the giants or Nephilim produced by them:
"The giants, who are produced from the spirits and flesh, shall be called evil spirits upon the earth...Evil spirits have proceeded from their bodies; because they are born from men and from the holy Watchers is their beginning and primal origin... And the spirits of the giants afflict, oppress, attack, do battle, and work destruction on the earth...
And these spirits shall rise up against the children of men and against the women, because they have proceeded from them...thus shall they destroy until the day of the consummation, the great judgment in which the age shall be consummated over the Watchers and the godless, yea, shall be wholly consummated. And now as to the Watchers... say to them therefore: 'Ye have no peace.'"
Such was the message given to Enoch, who transmitted it to the Watchers and their progeny on Earth.
The next question is: How was this information preserved for us? How did the succeeding generation learn these facts?
The Book of Enoch supplies the answer:
"And now, my son Methuselah, I tell thee everything and write it down for thee: I have revealed everything to thee, and handed thee the books which have to do with all these things. My son Methuselah, preserve the books that come from thy father's hand and hand them on to the coming generations of the world."
Enoch was also given a message to deliver to Noah, telling him that the whole Earth was to be destroyed. He was also to instruct Noah in the way of escape, so that his seed be preserved for all generations.
Unquestionably, the Book of Enoch confirms the biblical record that the Earth was defiled and polluted by the incursion of extraterrestrial beings, and particularly by their shameful behavior with the "daughters of men."
And as in the Book of Genesis, so in the Book of Enoch, God is incensed with this sexual coupling between celestial and terrestrial beings, and begins to move in an act of terrible judgment.
"And the Lord said, I will destroy man whom I have created from the face of the earth" (Genesis 6:7).