Consanquinity( marriage between blood relatives ie: cousin and cousin, uncle and niece, nephew and niece, etc.) has been practiced in the ME for over a hundred generations.To this day the Arabs in the ME have a very bad habit of marrying their 1st and 2nd cousins.The tradition of marriage between 1st cousins in the Muslim world is their way of keeping property and businesses in the family but it has led to the dire consequences of inbreeding. A number of studies indicate that IQ declines and the frequency of mental retardation increases with inbreeding. Any dog breeder will easily confirm this !
Exit polls predict Portugal's center-right coalition set to win election (Reuters)
from the article: Study: Israeli Jews live four years longer than Israeli Arabs