The problem is not Muslims reproducing like roaches in their own hell-hole Islamic countries. They are mostly dictatorships with little political or real-world power.
The problem comes when they do the same in non-Muslim majority nations which are democratic - which then will imply real power balance shifts with them inheriting considerable political power.
... either way they are still seventh century idiots. Sure they might overrun france and end up with nuclear technology, but, s the world turns that technology gets dated. Real quick.
Tell me... when was the last time Islam achieved a notable improvement/achievement other than a new suicide vest?
When was the last time they won a Nobel for advancements in the sciences/ math/ engineering /arts etc etc excepting Obama?