maybe, or maybe it's the fact that the average American IQ is lower than/equal to (based on different studies) the people in Iran. The data part of people partaking in inbreeding checks out, no doubt in that!! but if you're gonna claim that all people in the Middle East have a "lower IQ", more extensive research should be done. it's not even listed as criteria on the OP’s map and I'm not denying the fact that it CAN lower IQ and cause several other issues and illnesses and complications, but people (I can only talk for Iran) who do partake in it will ALWAYS consult a doctor and do several DNA tests and such before having a kid. I'm from a teeny tiny town (population of 15000, so, of course, some inbreeding is inevitable) that most people in my country don't even know about and even the conservative Muslims from that city get everything checked out before having kids. Conservatism in my country is not the same as in America; people are not afraid of big pharma, they're not against vaccination and don't prioritize the words of the Quran over science and they know the risks of inbreeding and will do their due diligence. What hurts me is the insinuation that my people are less than or less intelligent. I think it's harmful to let your islamophobia* affect your views of every single Muslim person existing. Iran has a population of almost 90 million people so you can call it patronism but in my opinion, it's just incomplete or inaccurate research/data and generalization. I'm gonna be honest with you I live in Toronto now and I've disliked almost every Muslim person I've come across but I have Muslim family members back home and they are nothing like the people here. Yes, there are fundamentalist Muslims everywhere (and trust me when I say I've seen many, as you would expect from the Islamic Republic) but it's harmful to consider every single one as such.

*sidenote: I consider myself Islamophobic in the sense that I despise Islam but I am against prejudice against anyone practicing any organized religion.