Angry Words - part 3

I'm searching for what to say about angry words still. The things I thought about saying seem a bit cliché. I can say that there is a place for angry words. The problem is that these anabaptists know a lot about conflict and conflict resolution and I don't. I thought about saying that angry words may be "a good thing". But they create tension and conflict. Is it a good kind of conflict? Is there such a thing as 'good conflict'? There appears to be. However how different is this justification for 'good conflict' from other, such as invading a country for the good of the foreign country?