Is Gen 6:1-8 a valid objection to polygyny? Isn't God pronouncing displeasure in verse 3 regarding verse 2? Furthermore isn't verse 5 indicating that "taking wives" is "evil"? Nothwithstanding the "Nephilim" verse 4, reference, from which I understand is a controversial verse about something considered obscure and irrelevant for us enlightened post-modern Christians.
Now it came about, when men began to multiply on the face of the land, and daughters were born to them, 2 that the sons of God saw that the daughters of men were [a]beautiful; and they took wives for themselves, whomever they chose. 3 Then the Lord said, “My Spirit shall not strive with man forever, [c]because he also is flesh; [d]nevertheless his days shall be one hundred and twenty years.” 4 The Nephilim were 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 who were of old, men of renown.
5 Then the Lord saw that the wickedness of man was great on the earth, and that every intent of the thoughts of his heart was only evil continually. 6 The Lord was sorry that He had made man on the earth, and He was grieved [e]in His heart. 7 The Lord said, “I will blot out man whom I have created from the face of the land, from man to animals to creeping things and to birds of the [f]sky; for I am sorry that I have made them.” 8 But Noah found favor in the eyes of the Lord.
Now it came about, when men began to multiply on the face of the land, and daughters were born to them, 2 that the sons of God saw that the daughters of men were [a]beautiful; and they took wives for themselves, whomever they chose. 3 Then the Lord said, “My Spirit shall not strive with man forever, [c]because he also is flesh; [d]nevertheless his days shall be one hundred and twenty years.” 4 The Nephilim were 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 who were of old, men of renown.
5 Then the Lord saw that the wickedness of man was great on the earth, and that every intent of the thoughts of his heart was only evil continually. 6 The Lord was sorry that He had made man on the earth, and He was grieved [e]in His heart. 7 The Lord said, “I will blot out man whom I have created from the face of the land, from man to animals to creeping things and to birds of the [f]sky; for I am sorry that I have made them.” 8 But Noah found favor in the eyes of the Lord.