Malachi 3:6 KJV For I am the LORD, I change not; therefore ye sons of Jacob are not consumed.
I, too, agree with Pastor John. The Holy Spirit is our best Teacher. Remember, God does not change, and if polygyny is a sin now, it was also a sin for King David, Abraham, and all the other OT saints who had more than one woman in a Holy Union. I found 39 men in the OT who each had more than one woman, and only two about whom we can be reasonably certain from the Biblical record that had only one woman. (Isaac and Joseph.) The 39 include 27 about whom it is said in Scripture that they had more than one woman, and for the others, their polygyny is inferred because of the number of children they had. Not all of the 39 were OT Saints; some were pagan kings or other non-Jewish people. There were four men about whom we can be reasonably certain that they had no women at all, because Nebuchadnezzar had Ashpenaz, the master of his eunuchs, take charge of them when they were still children. (See Daniel 1.)
This is only speculation, since Scripture is silent on the matter, but I think it is possible that Seth was the son of Adam and a woman other than Eve. If so, the mother of Seth would have to be a daughter, granddaughter, or other descendant of Adam and Eve. See Genesis 4:25 - Eve is not named as she is in the account of Cain's and Abel's births in Genesis 4:1,2. (Adam is not included in the list of 39 known polygynists. Other than Lamech, all known polygynists are post-Flood.)
Read Ezekial 23 and Jeremiah chapters 3 and 31, then try to tell me that God is a sinner, because He portrays Himself as having two wives!
One last thought about the question of whether or not polygyny is a sin: God is not shy about telling us that something displeases Him. For example, we don't have any argument about whether or not stealing is a sin. God very plainly says, "Thou shalt not steal." Romans 7:2-3 very plainly tells us that polyandry (a woman having more than one man at the same time) is adultery, and He also tells us very plainly, "Thou shalt not commit adultery." But where is the commandment, "Thou shalt not commit polygyny."?
Also, I mostly agree with you about Bible versions/translations. I call myself a "King James mostly" Christian. :lol:
Most modern translations, including the NIV (Not Inspired Version), were translated from the Wescott-Hort family of Greek manuscripts. Wescott and Hort were not believers, but were spiritists. They did not believe in the virgin birth or the resurrection. Further, the committee that translated the NIV included known lesbians.
But I have a feeling that you already know all this. If not, there are many websites that promote KJV only. Some are pretty good, others seem to take the attitude that you are not really saved if you read anything other than KJV! You probably know how to find them using your favorite search engine if you have not already found a few.
I know a missionary who spent many years in the former Soviet Union. He told me that he knows missionaries who are so rabidly "King James only" that they first teach people English so that they can read the King James Bible, because that is the only "real" Bible. If I thought like that, I would rather teach the locals Hebrew and Greek, not English, so that they could read the Bible in its original languages!
Having said all that, it is also my opinion that reading the NIV and other modern translations is better than not reading the Bible at all. My woman speaks English as a second language, Navajo being her first. She has enough problems understanding modern English, and the archaic English of the KJV-1769 (Authorized Version) is like a third language to her. She would really choke on KJV-1611, the Geneva Bible, or the Bishops Bible! Fortunately, she also has the Bible in her native language.
Another good version is the Modern King James, which, to the best of my knowledge, is available only as a module for the e-Sword program. (e-Sword is free; see
http://e-sword.net. I wish MKJV was available in a print version!) MKJV is KJV with the language modernized and uses only Textus Receptus for the NT, same as KJV. I also like NKJV, but that also uses the butchered Wescott-Hort manuscripts in a few places.