Corrupted Civilisation - Pre Flood

When God saw the evil upon the face of the Earth, he was on the verge of wiping out civilisation, except when he found favour with Noah and decided to start over with him.

The interpretation of the Scripture below has 2 vastly different intrepretations. The traditional interpretation was that the "sons of God" were from the line of Seth - the godly line - and the daughters of men were from the line of Cain. But how could godly men force themselves on corrupted women? The other thought is that "sons of God" were the corrupted line of Cain who made themselves kings and claim to be descended from gods as most ancient kings claimed. This blasphemous practice as well as polygamy (taking many daughters of man as wives) angered God so much that He regretted creating man. But in history, many kings claimed to be descended from some gods, and have concubines, eg China, India, Egypt and other civilisations; but God did not seek to destroy the world.

The interpretation above sounds very plausible and believable yet there are clearly inconsistencies. Another seemingly less believable interpretation seem to fit the Scripture better. The "sons of God" may refer to fallen angels and they mated with human females. The offspring are half angelic half human mutants called the Nephilim whose physical stature is clearly larger than humans. So the Nephilim may be the giants mentioned here as well as other parts of the Bible. If this is the case, then we could better imagine and understand why God is so outraged with this evil where human - angelic half breeds running amock in the world.

In the verses from Job 38:6-7 below, God speaks of His Creation of the universe and makes a reference to "sons of God shouted for joy". In the context of this, God mostly like refer to the angels as "sons of God" since he was describing the creation of the Universe and the early beginning.

Job 38.
 6 To what were its foundations fastened?      Or who laid its cornerstone,
 7 When the morning stars sang together,      And all the sons of God shouted for joy?

Genesis 6
¹ Now it came to pass, when men began to multiply on the face of the earth, and daughters were born to them, ² that the sons of God saw the daughters of men, that they were beautiful; and they took wives for themselves of all whom they chose.³ And the LORD said, “My Spirit shall not strive^[a] with man forever, for he is indeed flesh; yet his days shall be one hundred and twenty years.” ⁴ 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 whowere of old, men of renown. ⁵ Then the LORD^[b] 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. ⁶ And the LORD was sorry that He had made man on the earth, and He was grieved in His heart. ⁷ 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.” ⁸ But Noah found grace in the eyes of the LORD.