Their reproductive habits are disgusting for several reasons. I don't know if you are aware than many European countries allow Muslim men to bring in more than one wife. That is disgusting. They marry their cousins and produce a higher than average number of disabled children; families are dangerously inbred to multiple degrees. That is disgusting, IGNORANT AND CRUEL. The women are treated like brood mares, not like human beings. That is disgusting. They produce more children than they can support, and take advantage of Europe's suicidally generous welfare state. That is disgusting AND parasitical. People should not have more children than they can care for responsibly. Children are not expendable, and they are individual souls. I don't have a problem with big families, I have a problem with broods produced by multiple wives, who are themselves treated as property, not human beings, and that are dependent on state support.
That said, I have been an admirer of Chesterton, who if I remember right had no children, since I was in college. He said: "Tolerance is the virtue of the man without convictions."
I agree with you that having multiple wives and treating women as inferior is repugnant.
But what Chesterton said about large families, even though he had no children of his own, was that Capitalism (the way it is practiced) does not allow for one man and one woman to have 10 children and be able to afford them. He said that this situation was created by the Captains of Industry/Capitalism who wanted to promote abortion, divorce and contraception.
The modern superstition that it is irresponsible to have many children is unchristian and as repugnant as having multiple wives, a practice that divorce and remarriage actually effectuates.