actually cousin forgeters is pretty accurate, in fact it's probably a more common occurrence than goat loving
Which I can't say I'm surprised the most incestual culture in the world can't seem to get its stuff straight and hasn't been able to for hundreds of years. Inbreeding can cause all types of bad things.
Uhh, cousin marriage is a not uncommon practice all over the world.
And it's not exclusive to Islam. Your map even points out it has higher rates (approaching 10%) in Canada, South Africa, India, China and much of South America which have low muslim populations.
Cousin marriage is typically a means of retaining wealth within families. It's not particularly dangerous either.
If there's any reason for its increased prevalence in muslim/arab nations it's a byproduct of the prevalence of arranged marriages.
As for 'not getting its stuff straight for hundreds of years' because of inbreeding, the European Royal families successfully cousin-married for centuries and built empires that collectively conquered most of the world.
