Thus if he eliminates the people...
And in the same way the All-powerful Revenging Allah – glorified be His might – would take revenge in these two ways. In the same way His Eminence, Qaim (aj) would also seek the revenge of the blood of his forefather, Imam Husain (as) in these two ways, although in another sense. Because he will kill the killers of his forefathers (as) and also those who were satisfied with them.
And he will order his Shias and companions to slay them.” Third: It is that when the one who is seeking revenge is weak and incapable of avenging except by complaining to the ruler and the authorities that his rights have been usurped unjustly. And it is also clearly a type of seeking revenge. Fourth: It is that due to being weak and incapable of taking revenge he takes the help of others who have the strength that together they may perform this task.
In other words, cooperating willingly and providing means of revenge is a type of taking revenge. Since in this age we do not have the power to take revenge for our master, Imam Husain (as) except through the last two methods mentioned above, it is necessary on us according to the responsibility imposed on us to act upon these methods.