Also it's notable that the Rashidium didn't penetrate the Roman/Byzantine heartland of Anatolia the same way they took Iran, primarily because the Byzantines hadn't yet completely descended into Klingon Promotion territory, while the Sassanids were still beating the stuffing out of each other right up until they got conquered.What? Do you know anything about the thirty years preceeding the Muslim conquests? The Romans and Persians had spent 26 years beating the stuffing out of one another, were both broke, and had only a fraction of their armies from 600 still intact. The Persians were fighting civil wars after multiple assassinations of kings. Pointing out that the Arabs got lucky in their timing is not "anti-Muslim" bias.