And the Caliph...
And the Caliph, according to his understanding, wanted to maintain the unity of the Muslim nation and avoid mischief / fitna . And if Al-Husayn (as) remained in Al-Madina or Makkah and didn’t go out to Iraq, no one would’ve harmed him due to his high position in the hearts of the Muslims. To prove my words, I present to you this document which was a will written by Muawiya ibn Abi Sufyan when he was on his deathbed to his son Yazid, the First defendant.
As it was cited in Maqtal Al-Husayn by Al-Khwarizmi, Muawiya said in his will to his son Yazid the following: “As for Al-Husayn ibn ‘Ali, Oh Yazid! What can I say to you about him? Do not harm him, and be lenient with him. Let him go wherever he wants and don’t bother him. Threat and yell only but don’t hurt him, confront him openly or fight him by sword, nor strike him with a spear. Rather, give him bounties, bring him closer to you, and respect him.
My son, beware that you meet Allah with his blood on your hands! Or else you will be from the losers, for Ibn Abbas has narrated to me that Rasulullah (peace be upon him) at the time of his death hugged Al-Husayn to his chest and said, ‘He is the good of my nation, the righteous one of my household and the best of my progeny; may Allah (SWT) not give blessings to he who does not treat him good after me!’ Then the Prophet (S) added: ‘Oh Husayn, your killer and I will meet at the Day of Judgment in front of Allah and I will be the adversary on your behalf.
I am very lucky that Allah (SWT) made me be a plaintiff to your killers on the Day of Judgment.’ Oh Yazid, this is the narration of Ibn Abbas and I narrate to you that the Prophet (S) has said: ‘One day my beloved Jibrael came to me and said, ‘Oh Muhammad! Your nation will kill your son Al-Husayn. And his killer is the cursed one of this nation.’ And the Prophet (S) also cursed the killer of Al-Husayn numerous times, so beware!
Beware that you bother or harm him, for he is the beloved of the Messenger of Allah and he has a great right upon you. You did see how I used to have patience with him during my lifetime and I gave him my neck out of submission even though he confronts me with bad talk which hurts me. But I do not respond to him and cannot do anything to him since he is the only progeny of the Prophet on this earth.