The result of inbreeding is genetic damage, you get increased diseases, mental retardation, and lower intelligence. I call inbreeding a crime against the next generation. Now why is there so much inbreeding in Islam? Well, if you think about it you know the answer. Because of Muhammad, he married his first cousin, so that makes that process Sunna.
The Koran lays out rules of marriage, but it allows first cousins to marry. This is in Koran 4:23. So according to the Sharia, divine law, inbreeding is good. And what are the results of the Sharia? Half of Muslims are inbred, with lower intelligence, insanity rates are higher with inbred people, and the closer you are in blood relation, the more schizophrenia there is. In Denmark, three times as many Muslims fail the military intelligence test as the average Dane. 2/3 of all the Muslims in Denmark are illiterate. And in Denmark, education for slow children, slow learners, accounts for 1/3 of their educational budget. It’s expensive to have such people.
Sharia is evil, since it dictates the suffering of people is Allah’s wish. Now think about this, Islam says it is destined to rule the world, and if it does inbreeding will be everywhere and humanity will actually devolve. And this can’t be changed, because the Sharia is Allah’s law.