The Umayyads went too far in killing the pure family (of the Prophet)...

The Umayyads went too far in killing the pure family (of the Prophet), for they stretched out their sinful hands to those pure souls to whom Allah has made affection incumbent on all Muslims. They had a role in assassinating Imam 'Ali, the Commander of the faithful, peace be on him, as I (the author) have established. Mu'awiya assassinated the first grandson and plant of sweet basil of the Prophet, may Allah bless him and his family, Imam al-Hasan, peace be on him.

That was when he ordered his (al-Hasan's) wife, Ju'da daughter of al-Ash'ath,[2] to put poison into his food. After him, (his son) Yazid committed the most horrible crime shook [1] Ibn Abi al-Haddeed, Sharh Nahjj…