i agree with this. i am not aware of the bible specifically saying its forbidden to take a 2nd wife but it should be understood by passages like this. you also have the men, women and animals on the ark, they went two by two.
its also strange to me that exodus leviticus which is laws laws and more laws, laws how to button your shirt, you cant keep up with all of them, yet no mention of taking more than one wife.
And where the Bible doesnt specifically say then we look at the related scriptures especially the new covenant, the teachings that God gave us while in the flesh. And beautifully poetically Christ's teaching doesn't destroy the old but completes it. If someone can show me scriptures saying God commands a marriage can be one man, one woman but its okay in some cultures to be one man, multiple woman. Then i would agree. But no one can find this. Just because one culture says they know God, doesn't mean they know God. Truth will hurt. I know I wouldn't want to be called white washed tomes.