I don't really care if people have more than one wife.
It is their problem and its their choice.
Their problem and their sin.
My aunt's husband had a concubine when she got old
My married student went loco over someone in Canada
And they are Catholics
With regards to Muhammad
He really had 11 wives and Muslims acknowledge this
Muhammad's wives - Wikipedia
Examples of living Muslim leaders with wikipedia pages with more than one wife are:
Mohammad bin Salman - Wikipedia
Hassanal Bolkiah - Wikipedia
In my opinion, polygamy and poly-amorous relationship are examples of sexual immorality.
Divorcing a spouse for the reason other than infidelity and marrying another is adultery again a poly-amorous relationship.
Matthew 19:5-6 New International Version (NIV)
and said, ‘For this reason a man will leave his father and mother and be united to his wife, and the two will become one flesh’? So they are no longer two, but one flesh. Therefore what God has joined together, let no one separate.”
I don't think we are understanding each other somehow. I'm not advocating polygamy or adultery. My faith teaches monogamy and no sex before marriage.
The point I'm making is while both the Bible and Quran may both implicitly support monogamy, neither explicitly forbids it.
Its all very well criticising Muhammad for having more than one wife but both Moses and David who God chose as bearers of a Divine Message had more than one wife too.