He (a.s) has mentioned this attitude...

He (a.s) has mentioned this attitude, saying: “Your assassinating my father has made me refrain from you!” Indeed the murder of Imam Ali, the Commander of the faithful, and the pioneer of the social justice, was among the most important reasons that made Imam al-Hasan refrain from those ignorant people who made troubles, had desires, and deviated from the straight path!

Sparing of Blood Among the reasons for the peacemaking is that Imam al-Hasan’s urgently wanted to spare and not to shed the Muslims’ blood. If he had opened a door to war against Mu’awiya, he would have sacrificed his followers and his household; and through that the torch of faith would have been put out and Islam would have been uprooted. He (a.s) has mentioned that in his answer to the reasons of his making peace (with Mu’awiya).

He has said: “Most surely I was afraid that the Muslims would be uprooted from the surface of the earth. So I wanted someone to announce the religion!” He (a.s) answered those from among…