"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.
"The words of Jesus go right to the heart of our struggle: "Love your enemies, do good to those who hate you, bless those who curse you, pray for those who treat you badly" (Lk 6: 27-28). The more I reflect on these words, the more I consider them to be the test for peacemakers. What my enemies deserve is not my anger, rejection, resentment, or disdain, but my love. Spiritual guides throughout history have said that love for the enemy is the cornerstone of the message of Jesus and the core of holiness."
-- Henri J. M. Nouwen in “Peacework”