`Inbred and clannish’
Go together like sugar & tea, don’t they?
`Inbred and clannish’
It is the way to survive in the harsh desert plus it keeps all wealth (dowries) within the clan via first cousin marriage. Typically where two brothers have their offspring marry
wikipedia:
Marriages between first and second cousins account for over 10% of marriages worldwide.[1] They are particularly common in the Middle East, where in some nations they account for over half of all marriages.[2]