But who were the Bible was referring to as the Sons of God in Genesis 6? Were they the fallen angels or the godly line of Seth? Many Bible scholars, especially the conservative ones, were buying the theory that the Sons of God mentioned in Genesis 6 directly refer to Seth's descendants while the daughters of men are those of Cain's. There are instances, however, that the phrase "Sons of God" was also used to describe kings. It was believed that, at some point of time, Cain's line has ceased to be productive resulting to produce only female offspring while the line of Seth, on the other hand, continued to produce strong males. In the passing of time, Cain's line have successfully lured the robust males of the line of Seth and thus the intermarriage between the two bloodlines began.
I beg to disagree with that theory because, in the first place, talking about the "tribe of Seth" is nowhere mentioned in the book of Genesis. The word "nephilim", from the Hebrew word nefilim which refers to a race that once dominated the world before the Great Flood, do not only refer to mighty men but a giant race that actually existed in those days. For me, the Sons of God mentioned in Genesis 6 are the fallen angels; their intermarriage with ordinary mortals produced a hybrid race never before experienced in the history of the world. Although the angels, a perfect-spirited group of persons created by God, are not designed for marriage purposes, but they can freely choose to wear on a human flesh to hide their angelic beings. Freedom of choice is something God has allowed for all of His created beings to exercise. It was through that free will that Lucifer, the choicest of angels, fell short from the grace of the Lord (Isiah 14:12-15). The result has become the evidence itself: a giant race. Archaeological finds of giant skeletal remains in many different places of the world only made the claim about the past existence of giants stronger. Psalm 8:5 would be supporting the fact that the angels are, compared to humans, a little superior: "For you have made him (the man) a little lower than the angels". The Sons of God mentioned in Genesis 6 is no doubt the fallen angels of God and their intermarriage with the daughters of men were true, literally.