Genesis 16:12 He will be a wild donkey of a man; his hand will be against everyone and everyone's hand against him, and he will live in hostility toward all his brothers.".............
I don't think its a matter of race, or descent from a common ancestor. There are Muslims of all races (European, Asia, African, Mesoamerican); even the people called "Arabs" have in fact absorbed and assimilated many tribes (as the original posted article here explained.)
In other words, even "Arabs" are mixed-race, and "Muslims" are pan-racial.
The problem is culture; and, to be specific, religious culture.
The religious cultures based on the Koran and the Sunna are infected, possibly irreversibly, with the ideals of jihad and shari'a. In other words, their highest ideals are armed struggle, conquest, and the establishment of a religious political system in which the Umma (the Muslim community) dominates the Dhimmi (the submerged conquered people), living off of the cultural and physical resources of the Dhimmi until they're all used up, and then finding somebody else to rip off.