As for his statement:
“His son Yazīd killed our master al-Husayn and carried off his womenfolk as plunder.”
The reply is that, according to the unanimous agreement of the authorities on transmitted reports, Yazīd did not order al-Husayn’s killing. Rather, he wrote to Ibn Ziyād instructing him to prevent al-Husayn from assuming rule over Iraq. Al-Husayn—may Allah be pleased with him—believed that the people of Iraq would support him and honor (1) what they had written to him. He therefore sent them his cousin, Muslim ibn Aqīl. When they killed Muslim, betrayed him, and pledged allegiance to Ibn Ziyād, al-Husayn wished to turn back, but the unjust military detachment overtook him. He requested (2) permission either to go to Yazīd, proceed to the frontier, or return to his own land. They would allow him none of these options unless he surrendered himself (3) to them as a prisoner. He refused, so they fought him until he was killed as a wronged martyr—may Allah be pleased with him.
When news of this reached Yazīd, he openly expressed grief, and weeping (4) broke out in his household. Not a single woman of al-Husayn’s household was ever taken captive on his behalf. Rather, he honored al-Husayn’s family, gave them gifts, and had them returned to their own land (5).
Even supposing that Yazīd had killed al-Husayn, the sin of his son (6) would not be imputed to him, for Allah Most High says: ((7)
There is a well-known account of how he urged him to