If we read history...
If we read history, it becomes clear that Muawiyah’s heart was (as usual) impure and was not clear of bad intentions at the time of making treaty with Imam Hassan (as) (5). We read in Sahih Muslim: It has been narrated on the authority of Hudhaifa b. al-Yamani who said: People used to ask the Messenger of Allah (may peace be upon him) about the good times, but I used to ask him about bad times fearing lest they overtake me.
I said: Messenger of Allah, we were in the midst of ignorance and evil, and then God brought us this good (time through Islam). Is there any bad time after this good one? He said: Yes. I asked : Will there be a good time again after that bad time ? He said: Yes, but therein will be a hidden evil. I asked: What will be the evil hidden therein? He said: (That time will witness the rise of) the people who will adopt ways other than mine and seek guidance other than mine.
You will know good points as well as bad points. I asked: Will there be a bad time after this good one ? He said: Yes. (A time will come) when there will be people standing and inviting at the gates of Hell. Whoso responds to their call they will throw them into the fire. I said: Messenger of Allah, describe them for us. He said: All right. They will be a people having the same complexion as ours and speaking our language.
I said: Messenger of Allah, what do you suggest if I happen to live in that time ? He said: You should stick to the main body of the Muslims and their leader. I said: If they have no (such thing as the) main body and have no leader ? He said : Separate yourself from all these factions, though you may have to eat the roots of trees (in a jungle) until death comes to you and you are in this state.
Ibn Tamiyah al-Nasibi stated about this hadith: والخبر الثاني اجتماع الناس لما اصطلح الحسن ومعاوية لكن كان صلحا على دخن “The second news is about the people who gathered when al-Hassan and Mu’awiya made treaty, but the treaty was based on malice” (6) Mullah Ali Qari wrote: وبالخير الثاني ما وقع من صلح الحسن مع معاوية والإجماع عليه وبالدخن ما كان في زمنه من بعض الأمراء كزياد بالعراق “The second news refers to the treaty that took place between Mu’awiya and Hasan, and Dakhan refers to some of Mu’awiya’s Governors like Ziyad in Iraq” Mullah Ali Qari says the word ‘Dakhan’ refers to Ziyad but fails to include his teacher Mu’awiya under this definition/word.