PC: Zoroastrian Reconquista

[El_Presidente]

Persia didn't convert to Islam right after the conquest, with Zoroastrianism having a great-ish number of followers until (at least) the 11th Century. Zoroastrian rebellions took place in Tabaristan, where the Caliph had little control and several Zoroastrian dynasties ruled until the 9th Century (and, AFAIK, their conversion was more political than anything).
So, with the Anarchy at Samarra throwing the Caliphate in disarray, could the Zoroastrian communities in Tabaristan and what today is Turkmenistan reorganize, resist the Muslims and eventually take Persia back? The Zoroastrian population was, AFAIK, still majority in that area, and maybe a large enough uprising could force the Bavandids (who converted to Sunni Islam just 20 years before) to convert back to Zoroastrianism.

So, is this plausible at all?

 

[Monter]

Persia didn't convert to Islam right after the conquest, with Zoroastrianism having a great-ish number of followers until (at least) the 11th Century. Zoroastrian rebellions took place in Tabaristan, where the Caliph had little control and several Zoroastrian dynasties ruled until the 9th Century (and, AFAIK, their conversion was more political than anything).
So, with the Anarchy at Samarra throwing the Caliphate in disarray, could the Zoroastrian communities in Tabaristan and what today is Turkmenistan reorganize, resist the Muslims and eventually take Persia back? The Zoroastrian population was, AFAIK, still majority in that area, and maybe a large enough uprising could force the Bavandids (who converted to Sunni Islam just 20 years before) to convert back to Zoroastrianism.

So, is this plausible at all?

By the time of the Anarchy at Samarra it is too late, the Dabuyids are gone and the Alavids have been established as masters of Tabarestan, on top of that we have the Taherids (one of main agents of the Anarchy) as Emirs of Khorasan (soon to be replaced by the Saffarids and Samanids, none helps), plus one thing is reconquering Iberia, at the periphery of Islam, Persia and Mesopotamia are the centers of Abbasid power so any attempt at taking over is going to resisted badly.

Best bet would be the first fitnas of the Umayyads to go really bad, allowing the Dabuyids to make incursions beyond the Alborz and gaining momentum, even then it would be a slow and potentially doomed endeavor, but doable.