Why doesn’t the Bible condemn polygamy? 

Making a law where there is no law, rooted in what you wish were true rather than what is actually recorded in the Biblical record.

This guy doesn’t know what he’s talking about, or is deliberately lying.

So what your saying is god thinks in a linear time line,and can't see that because of wars there's going to be 10 women to every man,and clearly god is wrong for believing that a man could love multiple wives equally so he wasted his time making laws to treat them equally. Your clearly saying god is immoral in his actions,and deads. Remember he never condemned, outlawed polygamy or called it a sin, witnessed the marriages in his own eyes of how many like King David who already had at least 3 wives before god gave him his former masters crown,lands,and wives. Yes he must have married some of them to go from what 3 to at least 8 wives mentioned by name. God knew before he married Adam and Eve what he would call marriage. Remember don't add to or remove by the smallest word, letter or dot because god doesn't care what your thoughts of morality is but you better care what his are.

If a man wants to have more than one wife it is OK as long as he can support the first wife as well as the others and the other wife's can help the first wife and he doesn't love the other wife's more than the first wife. Having more than one wife is helpful if you want alot of children because a women can only give birth about two times a year but if a man has many wife's he can have a lot more children

So can we as Christians have a concubine or not?