The Holy Scriptures do not teach angel/devil-human hybrids (physically/sexually).
“The sons of God” = those that claimed to follow God, and accept the sacrifice of Genesis 3:15, calling upon the name of the LORD.
“the daughters of men” = those that were not calling upon the name of the LORD, merely children of fallen Adam, in his image, unregenerate women.
Basically the co-mingling of believers with unbelievers.
For more on who the “sons of God” are in Gen 6:2,4, please see Luk 3:38; Gen 4:26, etc., and for the daughters of men, see Gen 4:16-24
Compare with Gen 6:2,4
Abraham and Isaac in Gen 24:3,37
Esau and Jacob in Gens 26:34,35, 28:8,9 [comparing to Jacob in Gen 27:46, 28:1,6], 36:2
Isaac and Jacob in Gen 27:46, 28:1,6
Jacob and Hamor in Gen 34:9,14
Moses in Exo 34:15,16
See in Deut 17:17
Balaam in Num 25:1,2,3
See in Jdg 3:5,6,7
Samson the Judge in Jdg 14:1,2,3
See the Chronicles in 1 Chr 5:24,25
Ezra in Ezr 9:1,2,11,12
Nehemiah in Neh 9:2, 10:28,29,30, 13:23,25,26,27
Solomon in 1 Ki 11:1,2,3,4,5,6,7,8
Many “Sons of God” “looked”/“saw” [“saw the daughters of men that they [were] fair” and “took them wives of all which they chose” [Gens 6:2]] and “beheld” [Just as did Samson, “she pleaseth me well”, or King David who went after Bathsheba, the wife of Uriah the Hittite and his friend, through covetousness had Uriah killed in action “from the roof he saw a woman washing herself; and the woman [was] very beautiful to look upon” [2 Sam 11:2, 12:9] and Solomon who “multiplied wives” and “loved many strange women” and all Israel who took of the “daughters of the land”], and then “lusted and coveted” and so were ensnared being “Vex[ed], Beguiled, To Commit Trespass Against The LORD, Commit Fornication, Eat things sacrificed unto Idols, worshipped idols” [Num 25:18, 31:16; Rev 2:14]:
Jud 1:11 - Woe unto them! for
they have gone in the way of Cain , and ran greedily after the error of Balaam for reward, and perished in the gainsaying of Core.
See also the words of Jesus, as it was in the days of Noah and Lot:
Job 21:7,14, 22:15,16,17;
Matt 24:37,38;
Luk 17:26,27;
2 Pet 2:5, 3:3,6.
In the greater overall picture there is a like message and call for the “people of God” also today to “come out” of “Spiritual Babylon” [just as God had done with physical Babylon; Jer 51:9; Isa 52:11] that “great Whore” [Rev 17:1, 19:2]:
See
2 Cor 6:14,15,16,17,18;
Rev 18:4.
For “giants” of men, after the flood, see:
Gen 10:8,9, 14:5, 15:20;
Num 13:32,33;
Deut 2:11,20,21, 3:11,13, 9:2;
Jos 12:4, 13:12, 15:8, 17:15, 18:16;
2 Sam 5:18,22, 21:16,18,19,20,22;
1 Chr 11:23, 14:9, 20:4,5,6;
Isa 17:5, 45:14
For “men of reknown” see:
Num 1:16, 16:2, 26:9;
1 Chr 5:24, 12:30