And here is my response:
I can understand why that irks you, because it implicitly points out that that is exactly what you are doing, and that is to your shame. I love you man, but we should NEVER go outside of what Scripture clearly tells us. I told you this in our face to face meeting, and I will say it again. You are unable to find confirmation of this legalistic bias that you have against polygyny, and so you want to squeeze it out of Scripture where Scripture is at best silent. This is classic Eisegesis. If you would simply read and understand the Scripture for what it says, (i.e. Exegesis) you would be forced to acknowledge that there is nothing wrong with polygyny. It is going beyond Scripture that led to the RCC adopting all kinds of heresies, including praying to (or as they like to say "through") Mary, and the doctrine of transubstantiation. You can chronicle this for yourself and see how some of these doctrines were actually introduced by people we have always respected as church fathers. Legalistic monogamy is no different.
I have a couple of links to address some of the points you made the other day:
https://biblicalfamilies.org/resources/biblical/common-objections#165410
https://biblicalfamilies.org/resources/biblical/common-objections#165411
I resent being labelled as intellectually lazy. I am not trying to boast, but I have read through the entirety of Scripture multiple times over in both the KJV and NIV, and have memorized numerous passages of Scripture, including the entirety of quite a few epistles in the New Testament. I knew you were off the other day, when you were referring to the Benjamites in Judges 20:16, and had them confused with David's mighty men. I am quite familiar with that story of how a war was fought after a man's concubine was gang raped by the men of a particular city, and how all Israel went to fight against the Benjamites, and ultimately devastated them. Trust me man! I know the Word of God, and I am NOT lazy in my efforts to seek out what God has clearly said!
When I spoke of telling my son, "Because I said so", there was nothing intellectually or logically dishonest about that! I can trust that God knows best, and I don't question His authority, because I know and believe the truth of the resurrection of Jesus Christ, and the Hydroplate Theory confirms for me, that the Genesis account of the global flood is true. You know that when Abraham was told to leave Ur, he didn't ask God why! He didn't even ask why God wanted him to sacrifice his son Isaac! He trusted and obeyed, and he was called the friend of God. I suppose you could ridicule him as the ultimate redneck, but there really is no such thing as redneck theology. There is only the Word of God, vs philosophies handed down to us by human reasoning and fine sounding arguments that go outside the Word of God.
If God sees fit to tell me why, I listen to what He says. I could turn around and ask why for instance God wants to raise godly offspring or why He thinks men having sexual relations with other men is an abomination, and that would be just like my teenager. You don't have teenagers, so you won't be able to relate. I tell my son the reason, and he wants to know why for the reason I just gave him. It is incessant. That is what you have to look forward to, and I pray you will have the wisdom you need so that you won't fall into the trap of trying to answer every why your children throw at you. The fact is, my son knows that the Bible is true, and he knows why the Bible can be trusted, and doesn't need human reasoning, or any of this whole cockamamie, "Oh God loves us but gives us free choice" crap that you hear all the time in church, which simply doesn't sell when kids go off to college. This idea that we have to portray God as some sort of Omni-benevolent being in order to get people to like Him, and come to Jesus, just doesn't hold up when we see all the suffering in the world. We don't come to God because He is nice, but because He is realm and He is true, and when we can't understand WHY He does what He does, we can still trust Him.
I have read the entirety of Malachi, and God clearly says why He desired to make them one, but you are looking for a different reason, because that simply does not fit your narrative. You parrot the same rhetoric about the purpose of marriage being some sort of picture, The fact is, God does have two wives, and one day they will be one in Him. The same is true about Jew and Gentile becoming one in Christ as we see in Eph 2:13-16. When Jesus spoke about the two becoming one in Matt 19:5, He immediately followed that up by saying that they are no longer two, but one. So just as Judah and Israel both become one with God, as he restores them to Himself, they are distinct apart from Him, inasmuch as the Jew and Gentile is distinct apart from Christ, but in Him, we become one. So it is incidental that marriage DOES create a picture of Christ and the church, but that goes beyond Scripture, to claim that this is the reason for marriage.
Paul said in Galatians 5, that it is for freedom that Christ has set us free, and then proceeds to tell us to stand firm, and not allow ourselves to be burdened again by a yoke of slavery. He applied this directly to circumcision, but there is no reason why this should not also be applied to ANY of the traditions of men that are not found in Scripture, especially traditions for which men and women set aside the commandments of God.
I gave you an opportunity to show me FROM SCRIPTURE that polygyny is wrong, but you keep wanting to play semantics. I looked up the meaning of ἁμαρτία and the Hebrew word as well, and "missing the mark" is only one of the many definitions used for that word, but it is never used in that sense in the NT, and the word used in Hebrew for not missing a "hair's width", is slightly different than the Hebrew word used for sin. Etymologically it may indeed have that root as its origin, but over and over again, it is used to describe an offense, whether that offense be directed at God or at a fellow man. Needless to say, you are on unstable hermetical ground, if you are going to use that definition to replace the definition found in I John 3:4, which clearly states that sin is the transgression of the Law.
The only logic we need, is to show proof of the existence of God and the veracity of His Word, and once that proof is out there to be seen, it doesn't matter if we understand why men sleeping with men is an an abomination in the sight of God, or any of the other sinful things we find in the Ten Commandments or Prov 6:16-19. If God is real, you can choose to follow Him or reject Him, but you do not get to choose the consequences for doing so, whether you like His decrees or not.