Although dissimulation is such a natural thing that both Shia and Sunni and all human beings are needful of it, it was all the more necessary for the Imamiyah sect, and that is why it became a part of their religion. If Imamiyah had not resorted to dissimulation, their existence would not have been possible in the world, due to Bani Umayyah and Bani Abbas.
On the contrary, the situation of Ahlul Sunnat was such that due to Caliphate being in their favor, they had no need to resort to dissimulation and hence it did not become customary among them. The condition of the Imams of Ahlul Bayt (a.s.) and their followers during the time of Bani Umayyah and Bani Abbas was so perilous that they had to very strictly follow dissimulation.
If they had not resorted to dissimulation, they would have been destroyed. How funny that the opponents of Imamiyah regard dissimulation as hypocrisy and do not pay attention to its necessity, although dissimulation is such a natural matter that in moral and civilization matters, no human being has ever been exempt from it. When Shah Abdul Aziz published his book, Tohfa, in the beginning he mentioned his name as Ghulam Haleem and that of his father as Qutubuddin Ahmad.
Actually, there was no need of dissimulation and the Shah had no fear of his life, property and honor. Then also he liked to use the power of dissimulation. What was the need for the Shah to resort to dissimulation in such peaceful times? Thus, if Muhammad’s Progeny resorted to dissimulation during the time of Bani Umayyah and Bani Abbas, what was wrong in it? If they had not acted in that way, it would have been unjust to both, religion and wisdom.
We should know that the Imamiyah resorted to it not without any reason as mentioned above. But it had no connection to injustice and falsehood. If dissimulation is compared to the Ahlul Sunnat theory of validity of consensus of non-Bani Hashim persons and invalidity of consensus of Bani Hashim persons, the difference would be obvious. Indeed, this matter was established to murder the truth, as is proved to all.