Answer : It is difficult to say that the prayers of all classes of Shiites are not accepted. Rather, there is class division among them. There are groups of Shiites who are outright infidels. Such as Isna Asharia Dal and Bar Imam group. They are not Muslims, how can they have prayers again. However, there are some who cannot be directly rejected. There is such a group who consider Abu Bakr , Umar , Uthman and other Companions to be Muslims. But Ali gave precedence to them. They are right-wingers. May Allah accept their prayers.