If anybody is interested in the Muslim practice of marrying cousins and the results, googling terms such as "are Muslims inbred" reveals interesting articles.
For example, what is the correct term for cousins marrying?
"Mohammed Shafiq, chief executive of the Ramadhan Foundation, which promotes the image of Muslims in Britain, said: ‘I know many Muslims who have married their cousins and none of them have had a problem with their children... Using language like “inbreeding” to describe cousins marrying is completely inappropriate and further demonises Muslims.’
