Keeping it in the family - The consequences of Muslim inbreeding

In many Muslim communities, it is a source of social status to marry one's daughter or son to his or her cousin.
Intermarriage also ensures that wealth is kept within the family. Islam’s strict authoritarianism plays a large role as well: keeping daughters and sons close gives families more power to control and decide their choices and lifestyles.
More than half of Pakistani immigrants living in Britain are intermarried.
The research, conducted by the BBC and broadcast to a shocked nation, found that at least 55% of the community was married to a first cousin.
This is thought to be linked to the probability that a British Pakistani family is at least 13 times more likely than the general population to have children with recessive genetic disorders.”