However...
However, within this short historical period of 64 years, especially after the sad demise of the Prophet of God (s), the Muslim community witnessed certain adverse and unanticipated events which eventually led the Umayyad rule over them.
Banu Umayyah (the Umayyids) that was the polytheist tribe, and among the most aggressive ones against the Prophet (s) and the Muslims, took the reign of Caliphate and command of the Muslims' lives, property, and honor just within 40 years of the demise of the Prophet (s). Yesterday's rebels and polytheists now returned triumphantly and sat on the Prophet's (s) pulpit and proclaimed to be the commanders of the faithful!
Those freed at the conquest of Mecca and those who enjoyed the Prophet's clemency and compassion (known as 'tulaqa'), were resolute to take his Ummah as prisoners!
It was thus that after the battle of Harrah “Those among the children and descendents of Ansār (Helpers) and Muhājirin (Emigrants) who survived this tragedy had to formally admit in front of the commander of the Shāmi (Syrian) army that they were the slaves of Yazīd (the leader of the Umayyid) and that he is allowed to do with them whatever he wished to!” Achievements of this Research This research does not intend to call the uprising of the inhabitants of Medina against the oppressive Umayyid rule of Yazid as great socio-religious bravery, although it can neither ignore the existence of religious, humanistic, and reformative motivations in that uprising.
However, it can definitely arrive at the conclusion that the trend of Islamic Caliphate transformed into an anti-Islamic and anti-human trend in which Yazīd's hereditary monarchy represented the peak of this deviation. The foundation of every government, its goals, its treatment of subjects and policies in general and its performance in particular are the most self-evident indicators of its rightfulness, legitimacy, and humanness, and the clearest evidences of its illegitimacy as well.
“Harrah tragedy” is only second to the “great tragedy of Karbalā” and the martyrdom of the descendents of Prophet (s) at the hands of Yazīd's army that was caused by the incompetence and oppressive nature of the Umayyid rule. It evidently showed that if the government of a Muslim society gives up the religious and human standards, how disastrous it can be to the religion and the Muslim ummah .