Fear not. The Muslims evidently do obey this commandment, therefore they are apparently more godly than we, therefore they are favored by God. By letting the Muslims win, we therefore will have satisfied the will of God. QED.
You've got the situation. A group which does not generate children at replacement rate (or better) will eventually disappear, and be replaced by a group with a higher reproduction rate
You see it happen in Europe. The non-Muslim Europeans are not having children at anywhere close to replacement rate. The European Muslim population is growing rapidly, with Muslim women having many kids. Eventually, they will achieve political dominance.
It looks like a culture which allows women to enter the workplace (and choose not to have children) will over the long-run be overrun by a culture which mandates that its women produce babies, and does not give the women any choice in the matter
Being godly is a choice. Choosing to do his will is a choice. Ironically, in the Bible it states, "I put before you this day, life and death, blessing and cursing; therefore choose life". We get to choose. The West is ignoring it, the Muslims are heeding it. We're the fools to our own peril.