Inbreeding among Muslims for 1400 years?

I am not at all familiar with Pickerington Post blog. So I haven’t confirmed this “research.”

Massive inbreeding among Muslims has been going on since their prophet allowed first-cousin marriages more than 50 generations (1,400 years) ago. For many Muslims, therefore, intermarriage is regarded as being part of their religion. . .

The BBC’s research also discovered that while British Pakistanis accounted for just 3.4% of all births in Britain, they accounted for 30% of all British children with recessive disorders and a higher rate of infant mortality.

It is estimated that one third of all handicapped people in Copenhagen have a foreign background and 64% of school children in Denmark with Arabic parents are illiterate after 10 years in the Danish school system.

The research appears to be only at right wing website and all cite the same Danish psychologist, Nicholai Sennels .

http://joemiller.us/2015/09/muslim-inbreeding-has-corrupted-islams-psyche-and-the-results-are-alarming/

http://pjmedia.com/blog/the-problem-of-inbreeding-in-islam/

The dissenters: http://theamericanmuslim.org/tam.php/features/articles/robert-spencer