The initial conquest was extremely brutal, but there were few cases of forced conversion. Like many areas taken over by the early Arab caliphates, there was a s

The initial conquest was extremely brutal, but there were few cases of forced conversion. Like many areas taken over by the early Arab caliphates, there was a strong incentive to not encourage conversions, as the Jizya taxes leined on Zoroastrians, Christians, and Jews were one of the more significant sources of state revenue. The first hereditary Muslim dynasty, the Ummayads, prohibited non-Arabs from converting for this reason. Many of the Ummayad Caliphs had deeply bigoted views towards non-Arabs, discriminating against both non-Muslims and Muslims of Non-Arab ethnicity and were extremely hostile to Iranian culture, in some cases executing Iranian subjects for being literate in Persian. Iranian fighters of Sunni, Shiite, and non-Muslim faiths were cruicial in the Abbasid Revolution[1] overthrowing the Ummayads, and afterwards, Iran regained its place as the cultural capital of the Achaemenid and Sassanid dynasties. https://en.wikipedia.org/wiki/Abbasid_Revolution#Discontent_among_Shia_Muslims https://en.wikipedia.org/wiki/Abbasid_Revolution#Discontent_...