Islam spread across the world and conquered several distinct gene pools. But the core of Islam is Arabia and the Arabs are Semites. They share common ancestry with the Jewish people who are also Semites.
The Jews have produced the greatest number of Nobel Prize winners in proportion to their population of any ethnic group. The Arabs have produced perhaps the least. Given the common ancestry, I would say it was cultural rather than genetic.
Well, they've been marrying their first cousins for a couple thousand years.
I stand corrected.
It is later branching. Diaspora provided quite a selective evolutionary pressure to survive by one's wits.
Arabs are Semites, and so one would expect them to, er, have achieved something beyond a shame/honor view of the cosmos. I scratch my head over this phenomenon every day. Perhaps the concept of the future, or even the present, is alien and repulsive to them.
You are talking about Ashkenazi Jews who live in the advanced West. But what about Sephardic Jews who live in the backwards Middle-east?
This may be a false premise. I suspect that only the dumbest of the dumb sub 50 IQ types believe in is-SLIME. Take the left side of the bell curve from any group and keep them locked in this death cycle cult and very soon you will have an entire sub specie that are dumb enough for is-SLIME.