The best persons among them to lead such resistance were...

The best persons among them to lead such resistance were undoubtedly the descendants of 'Ali and Fatima (peace be upon them). The reason was that there were a number of their descendants who were known for their piety, wisdom, knowledge and courage. In fact, they were regarded as more qualified candidates for the caliphate. Moreover, they were the true descendants of the Prophet and their direct lineage to him generated a sense of loyalty and love for them.

In addition, because their rights had been usurped and they had suffered wrongs at the hands of the Umayyads, the masses had a natural inclination and sympathy for the ahl al-bayt. Consequently,