“Then tell Pharaoh that this is what YHVH says: ‘Israel is my son, my firstborn son.’” – Exodus 4:22
“The sons of God saw that the daughters of men were beautiful, and they took as wives whomever they chose.” – Genesis 6:2
The Book of Genesis in Hebrew is B’reshit, meaning ‘In the beginning’, or even possibly with the same spelling, Barashit” (“I will establish a son”). “The sons of God” idea begins with Adam as the son of God (Luke 3:38), and continues that line thru Seth – meaning “established” (not through Cain, from which came a line of pagans and murderers) and through Enoch and Metushalach and Noah to Shem to Abraham, who would not have his son Isaac marry of the Canaanite women, but sent back for a wife from his own line. The line continues to Isaac’s son Jacob and to his sons comprising the twelve tribes of Israel, called by Moses the sons of God (“you are the sons of YHVH your God”- Deuteronomy 14:1), to David through whom would descend the quintessential Son of God, Yeshua (“I will declare the decree: YHVH said unto me, You are my Son, this day have I begotten you”– Psalm 2:7), who empowers us to become sons of God (rather than only servants).
The Torah commands the children of Israel to marry within their tribes, and priests to marry only within the tribe of Levi. An essential principle throughout the Torah is forbidden intermarriage between God’s sons and the pagan women, which was and is a continuing problem (especially in that pagan women are often more sensually inclined), as we see at Baal Peor, the Moabite girls seducing Israel’s young men to worship their idols at the suggestion of Balaam (also mentioned in the New Testament: Revelation 2:14; 2 Peter 2:15), the seduction of King Solomon to bring idolatry into Israel by foreign wives, and the rebuke by Ezra and Nehemiah of the intermarriages at the return from Babylon. It is repeated in the NT by the admonition to “not be unequally yoked with unbelievers” (2 Corinthians 6:14).
Nefilim (meaning “the fallen ones”) were born of the intermarriage of the line of the sons of God with the pagan lines through Cain, creating a rough and warlike and violent race of men who were condemned to the flood in the days of Noah, whose seed would continue the line of the sons of God through his son Shem, meaning ‘Name” – those who would carry the Name of the one YHVH: the Shemites (aka: Semites). The unfortunate idea of angels or demons having sex with women and producing monsters is to reduce the Torah to Greek mythology, which is foreign to Hebrew thought. Yeshua told us, ‘In the resurrection, people will neither marry nor be given in marriage; instead, they will be like the angels in heaven’ (Matthew 22:30). I would think that would settle the issue.