The Middle East would be a great place to live and prosper (look at all that oil!!!) if it weren’t for all all those inbred semi-retarded Muslims. Why do they believe in a mass murdering false prophet? Blame this on inbreeding, more specifically first cousin marriage which done once is not the worst thing. But done over countless generation it will make you evil and stupid
You have two brothers, one with a daughter, one with a son. They get married then repeat over generations. This will give you genetic defects and stupidity. Also ultra-clannishness. All dowry wealth and other wealth is kept within the clan
Zubin Mehta, famous conductor, was a Farsi. He admitted that first cousin marriages were bad but, he added, sometimes they produced genius, like himself! No conceit there. (sarcasm).
The British peerage used to do that as well. They don't now, mostly because the crown bankrupted the peerage.