Who were “the sons of the true God” that were involved? Were they men who were worshipers of Jehovah (as distinguished from the general run of wicked mankind), as some claim? Evidently not. The Bible implies that their marriage to the daughters of men resulted in whipping up the badness in the earth. Noah and his three sons, along with their wives, were the only ones in God’s favor and were the only ones preserved through the Deluge.—Ge 6:9; 8:15, 16; 1Pe 3:20.
Hence, if these “sons of the true God” were merely men, the question arises, Why were their offspring “men of fame” more than those of the wicked, or of faithful Noah? Also, the question might be asked, Why mention their marriage to the daughters of men as something special? Marriage and childbearing had been taking place for more than 1,500 years.
The sons of God mentioned at Genesis 6:2, therefore, must have been angels, spirit “sons of God.” This expression is applied to angels at Job 1:6; 38:7. This view is supported by Peter, who speaks of “the spirits in prison, who had once been disobedient when the patience of God was waiting in Noah’s days.” (1Pe 3:19, 20) Also Jude writes of “the angels that did not keep their original position but forsook their own proper dwelling place.” (Jude 6)
Angels had the power to materialize in human form, and some angels did so to bring messages from God. (Ge 18:1, 2, 8, 20-22; 19:1-11; Jos 5:13-15) But heaven is the proper abode of spirit persons, and the angels there have positions of service under Jehovah. (Da 7:9, 10) To leave this abode to dwell on earth and to forsake their assigned service to have fleshly relations would be rebellion against God’s laws, and perversion.
These fallen angels had the power to materialize in human form, when they materialized as humans they materialized reproductive organs, this is the only way they could have relations with the daughters of men. Their offspring were called Nephilim, gib·bo·rim′, both mean giant/s.
This was an unnatural union, the results being giants,8 to 10 feet tall that had twelve fingers & twelve toes.
When the flood came these fallen angels dematerialized their human bodies & were no longer a sexual creature, now they were back as spirit creatures that were thrown in to tartarus, were all of the demons & Satan are going. Jude 6
Spirit creatures do not have sex organs & God did not hold back from punishing the angels that sinned.” These, Jude says, “did not keep their original position but forsook their own proper dwelling place” in heaven. They came to earth before the Flood and took on fleshly bodies so as to engage in sexual relations with the daughters of men. As punishment for their improper, unnatural conduct, they were thrown into “Tartarus,” or as Jude’s account says, they were “reserved with eternal bonds under dense darkness for the judgment of the great day.”—2 Peter 2:4; Jude 6; Genesis 6:1-3
it-2 pp. 491-493 Nephilim