They are still with several wives and large families. What are they going to change to fit in?
Which wife do you throw out of your clan?
I have no idea. When did this refugee policy start? If anything they should be a little selective with the families but what are you going to do?
Those that come with plural wives will change their arrangements here. Excess wives will be taken care of by family. Each man will have no more than one. Most are or will soon be Christians and the practice dies at the border.