The founders and promoters of the theory of insulting and cursing somebody by name and specifications in the Islam

In a few parts of the Islamic society, we observe some Muslims who say words of insult and curse as to some people by their name and specifications and even sometimes blaspheme them. Such a manner seems to have been practiced since long ego and even recently the pretenders of the Islamic government and religious thought are still practicing it, too. Since their first organized movements to ruin their rivals, the Umayyad followed a policy to promote insult and curse against the children of holy Ali. Along with their different directions, other parties showed their due reactions to the Umayyad. Keisaniyyah is one of those parties who aimed at the first two caliphs by the arrow of their words. The efforts made in this research show that the two parties of the Umayyad and Keisaniyyah as two different movements add fuel to the practice of insulting and cursing people by name and specifications. Before they come to power, The Abbasid who were the inheritors of Keisaniyyah, used to promote such a practice.