Here we touch one of the greatest dangers that face peacemakers: that peacemakers themselves become the victims of the evil forces they are trying to overcome. The same fear of "the enemy" that leads warmakers to war can begin to affect the peacemaker who sees the warmaker as "the enemy." Words of anger and hostility can gradually enter into the language of the peacemaker. Even the sense of urgency and emergency that motivates the arms race can become the driving force behind the peacemaker. Then indeed the strategy of war and the strategy of peace have become the same, and peacemaking has lost its heart.
One of the reasons why so many people have developed strong reservations about the peace movement is precisely that they do not see the peace they seek in the peacemakers themselves. Often what they see are fearful and angry people trying to convince others of the urgency of their protest. The tragedy is that peacemakers often reveal more of the demons they are fighting than of the peace they want to bring about.
— Henri J. M. Nouwen in Peacework