Interestingly in the middle east with all these arranged marriages, with alot being first cousin marriages, the infant mortality rate over there along with birth defects has skyrocketed in recent years. The average IQ is around 100. For most muslim children being born its a shocking 79. This is the borderline number for mental retardation. Keep in mind that the numbers concidered for low intelligence are 85-90. This is the result of 1400 years of inbreeding. These people have F@@ked up their gene pool. Has probably caused irreparable damage. But their thinking is, its ok because mohammed did this, its in the koran.
When dealing with people with an average IQ that low they are easy to control and told what to do by their overlords the imams. Additionally the lower IQ the more likely you have paranoid schizophrenia, and violent tendencies because people like this cannot intergrate into society , Independent thought goes right out the window. Think about it this way. 50 generations of inbreeding, coupled with a "holy book" that preaches hate and violence is a recipe for disaster.