>>13547406They were destroyed genetically before they were destroyed militarily. As you know human races are adapted to different biomes. This is why the huns and other mongoloid species see great sucess during mini ice ages. The same goes for arabs who thrive in desert. The Romans had a desertification problem, the world was generally getting warmer in antiquity and the deserts grew closer to the coast bringing arabs with them. Then the problem was accelerated by deforestation in central and eastern Europe which lowered the rainfall in the middle east dramatically. It's why you get ancient and once thriving cities like Edessa that end up being sat in the middle of a great big desert surrounded by camel herders.
By the time the Muslims took the middle east it was mostly already settled by christianized Arabs, and had already gone from being the cash cow of Rome to a bit of a wasteland.
