Shiasm considers nothing wrong with this...
Shiasm considers nothing wrong with this, but quite the contrary, this was done in compliance with logic and reason. This is a fact that the faith of the Shia was never forgotten. The hearts of the people have always hung to the Prophet's household. They were victims and deprived of their right. People gave their support as the occasion arose and the opportunity invited. Poets have narrated this faith.
Farazdog is a good example of one of these poets whose famous laudation addresses Husham telling him as to who Imam Zainulabedeen was. Mosa Bin Naseer was the governor of Africa. He had a slave by the name of Tariq. Tariq conquered Spain. Eventhough they held offices in the government of Bani Ommiya, they were Shia. Because of his being a Shia, Tariq's properties were confiscated and he himself was dismissed, regardless of his services. The Shia belief had penetrated even into Mawiya's family.
Mawiya's grandson, Yazid, was a Shia. He openly accused his father and grandfather and announced his allegiance to Ali and other members of the Prophet's House. Likewise was the situation in the Bani Abbas dynasty. It is the Truth and the originality that the Shia faith has survived throughout ages in spite of the ups and downs that has disturbed it and posed as a threat to its holder. From the political aspect, any Shia was restricted from holding any office in the government.
The tyrant and cruel rulers of the Bani Abbas dynasty like Mansoor, Haroon and Mamun had knowledge of Shiasm, however contrary to their knowledge they crushed the Shia thought in order to obtain and keep their power. Going down the line of the Bani Abbas dynasty we see another ruler, Muntasar, who held the Shia thought. Again, another by the name of Naser; he too was Shia.
At Samerre (Iraq), the place of disappearance of Mehdi (AS), the twelfth Imam, had been entrusted to and was repaired by Naser. There are narration from Shia sources, which say that Naser was Shia and regarded himself as a deputy of the twelfth Imam, Mehdi (AS). The Shia faith is Islam. Neither greed corrupted nor ambition has polluted it. They did not desert the Prophet. When he was no more the tradition of THADALAIN goaded them to the Prophet's household - the Imams, twelve in succession.
Nothing was added there to; nothing was reduced there from. It was the same in the Prophet's lifetime and remained the same throughout the fourteen centuries. What had history to do with it? They attribute it to history.