One of the big problems in the Arab countries is the incredible amount of inbreeding. Not brother and sister, but many, many cousins intermarry. Men and women are not allowed to socialize in an open environment, so they tend also to marry within the family.
That is reflected in a strong clannish mentality, and lack of any tolerance for anyone who is not in your particular grup.
That is reflected in a strong clannish mentality, and lack of any tolerance for anyone who is not in your particular group.
That, more than anything else, explains the insane tribal wars in arab-land.