The history of caliph assassination

Some of what had been written in the book of Ibn Hazm " Nakt Alarous " about muslims caliphs who were killed, since the emergence of Islam: Omar Bin Al-Khattab, the second caliph: stabbed with a dagger in the navel. Othman Bin Affan, the third caliph: cut into pieces with swords. Ali Bin Abi Talib, the fourth caliph: hit by sword. Abdullah Bin Zubair: Kill with swords and crucified. Marwan Bin Alhakam: his wife, overlayed him with pillow until he died. Omar Bin Abdul Aziz: poisoned. Al-walid bin Yazid: cut into pieces with swords. Ibrahim Bin Al-Walid: drowned. Marwan Bin Muhammad : killed with sword. Alsafah: poisoned or maybe died of smallpox. Al Mahdi: poisoned by his slave. Al Hadi: thrown over a cliff into a river. Alrashid: killed by his doctor Ibn Bukhtishu. Alamin: killed with sword. El-mutawakil cut with swords. Almontaser: poisoned with mercury spilled in his ear. Almosaeen: killed with sword. Almoataz: imprisoned in bathroom until he died. Al-Muhtadee : killed with a dagger. Almoatamed: killed by throwing in his throat melted lead. Al-moqtader: Cut with swords. Almunther: killed by his brother using poisoned scalpel . Hisham Almoaiad: killed by strangulation. Al Mahdi: Cut with swords, "Mohammed bin Hisham". Suleiman Bin Alhakam: Cut with swords. Almustathher: killed by sword. Almustakfi: poisoned. Qassem Bin Hamoud: stabbed by daggers. Yahia bin Ali bin Hamoud: killing the Stabbings. Yahya bin Ali bin Hamoud: killed by sword. Hassan Bin Yahya bin Ali bin Hamoud: poisoned. This was a part of their bloody history which they pretend that it was a period of stability, it is unlike they claim that the islamic state was the state of equality, justice, and goodness.