Furthermore...
This order was implemented so strictly that as written by Ibn Abil Hadid, the Shi'ah took refuge in the houses of their relatives and friends. Even then they were afraid of their slaves and slave-girls lest they should divulge the secret, because if anyone was not on good terms with another he reported to the authorities that such and such person was a supporter of Ahlul Bayt. The people were, therefore, arrested on mere accusation and suspicion and were tormented and made homeless.
This persecution was more severe in Iraq during the rule of Ziyad bin Sumayya as compared with other places. In spite of Imam Ali's brilliant past record and the honor enjoyed by him in Islam it was made necessary that, in all the Islamic countries and the areas, which formed part of the territories of Islam, he should be abused and cursed in the sermons of Friday prayers and also at other times, and Mu'awiya and Yazid should be honored and praised.
Mu'awiya wrote officially to Ziyad bin Sumayya, the Governor of Iraq, that the evidence given in any matter by a person, who was known to be a Shi'ah, should not be accepted, and those, who provided him shelter should also not be treated to be honorable. Hujr bin Adi, Rashid Hujari and their eleven companions were subjected to the severest persecution and torture, so much so that Mu'awiya killed six of them who were at that time the best persons.
There were many, whose hands and feet were amputated and pins reddened in fire were thrust into their eyes, and some others were buried alive. The evil propaganda of Mu'awiya and his agents in Syria and other Islamic territories misled the people. Whosoever uttered a word against Mu'awiya was treated to be a murderer of Uthman and shedding his blood was considered lawful.