content: Wikipedia has a page on cousin marriage in the middle east. It has a similar map and they are talking about first and second degree cousins. https://upload.wikimedia.org/wikipedia/commons/thumb/7/7b/Global_prevalence_of_consanguinity.svg/863px-Global_prevalence_of_consanguinity.svg.png  Prevalence of marriages up to and including distance of second-degree cousin in the world according to The National Center for Biotechnology Information in 2012.  https://en.wikipedia.org/wiki/Cousin_marriage_in_the_Middle_East  They also have a page about genetic studies on arabs which mentions that they have more genetic diseases than other ethnicity:  it indicates that Arab countries have among the highest rates of genetic disorders in the world  and that cousin marriage is a contributing factor:  Moreover, cousin marriages (conseigenity)and endogamy (marriages restricted to minority sects) excaberate the problem.  https://en.wikipedia.org/wiki/Genetic_studies_on_Arabs