Is it possible for the Qarmatian state in Arabia, which lasted from the late 9th till the late 10th centuries, to linger for a bit longer?
From what i can discern of them, they were an apocalyptic, very radical Shia Muslim sect, who were bent on avenging Ali's death no matter the cost. Their most famous atrocity was the Sack of Mecca (circa 930 AD), in which they desecrated holy sites and massacred large crowds of pilgrims. They even managed to steal the Qaaba (some Ocean's Eleven style shit, if less subtle) and hold it for a large ransom, eventually paid for by the Abbasid caliph. Their center of power was in eastern Arabia and far southern Iraq.
So, how can the Qarmatians, despite their infamous status, estabilish a more lasting state?
And what would be the effects of a longer-lasting Qarmatian state?