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Heh. Ignoring the first 2 bits of dren and moving on to the third, Muhammad united the arab tribes completely did he? No internal strife at all, eh? Cause, it's not like there exists any strife between the Shi'ite and Sunni movements, right? Nope, none at all. In fact there is so little strife that it would be completely incorrect to claim that there has been a low grade (and sometimes not so low grade) civil war going on within Islam for the past 1350 years.