No, they are not breeding themselves out of existence. Think of our own stereotypes of Appalachia, which actually has some basis in fact. They (in)breed like rabbits and show signs of genetic defects. And some of the manifestations of those defects are lower intelligence and being prone to random violence.
The Clampetts were muslims at heart. And got their money from oil, too.
Hey, dems fightn’ words
Eight Generations West Virginia
My Great Aunt was the first Female to graduate from
John's Hopkins Medical School - 1922
A Brilliant and Formidable Woman
I've seen plenty of poverty
Homes lucky to have an outhouse
Very Limited educational opportunities
People Ignorant, but not stupid
Currently in Oak Ridge, Tennessee
Oak Ridge National Lab is
World Famous in Energy Research
Dolly Parton came from very meager beginnings
Sounds “Country” but is brilliant
Patricia Neal (actress) was a local, but
Started the first dedicated
NeuroRehab unit(stroke)in the World
in “Little Old Scruffy Knoxville”
If "Re-entrant Genetics" occurred,
it was because 100 years ago, the average person was
born, raised, got married, and died
never having traveled greater than 10 miles
because of geographic limitations
Locals are quite aware that Flatlanders,
hearing the Southern Appalachian Accent,
underestimate the speaker's intelligence,
and use it to their advantage with "City Folk"
In my experience however,
Kissn' Cuzzin's were actually rare
So let's put that canard permanently to rest.
On the larger point concerning Muslim inbreeding, "Islamic Jihad" by M.A. Khan shows that medieval Islamic reproduction consisted largely of Arabian males mating with enslaved women brought back to western Asia as the spoils of war (India was a prime target, but they craved the fair-skinned Serbs, Slavs and Magyars, too).
Islamic conquest is no longer what it was 1000 years ago, but there is a constant influx of "new blood" as previously isolated tribal cultures intermix because of modern pan-Islamism, and because of --- very regrettably --- conversions.
Muslim men from western Asia and North Africa who are students in Europe and the USA, for instance, are highly applauded if they seek out Western women for marriage, provided, of ourse, that the woman converts to Islam. And that happens a lot
< It maes me shake my head and wonder about the mental deficiencies, not of the Muslim men, but of the Western women.