It's justified, yes. That does not make it right. I don't mean to talk down on you, especially because you are aware of enough of the problem to know that challenging them with force is the answer. I agree that they must be slain, but hatred will lead to unjust slayings, mutilations, torture, all sorts of morally repugnant things. It's better to slay them with an even hand, devoid of hate. I don't think this has ever happened before in human history, and I know that if it were, a new system would have a solid chance at growing and taking root. If we end this regime of evil with more evil, we do nothing but continue the cycle. The regime must be stopped, and I won't turn away people with vengeance in their eyes. As you say, it is justified.