And calling someone a "warmonger" just because they feel that a people have the right of self-defense accomplishes exactly what?
Under proper circunstances (admitedly rare ones), it might bring questioning about what self-defense is and how proper it is to call aggression by that name.
I can't speak for others, but I want peace. But I also know we have to work for peace as it's not just going to fall into our laps, and there are various ways this may be accomplished, and I do prefer the more peaceful ones. After all, the people I have admired the most was Gandhi, King, Cesar Chavez, and Mandela.
BTW, I hope you're aware of the fact that dharma does not teach against the defense of the innocent even if that involves military action.
That is one of the reasons why personal discernment has no substitute.