Volf on divine violence

Here is Miroslav Volf, a pacifist himself, on why Christian nonviolence actually needs the vengeance of God to be coherent (not to mention Biblical):

My thesis that the practice of nonviolence requires a belief in divine vengeance will be unpopular with many Christians, especially theologians in the West. To the person who is inclined to dismiss it, I suggest imagining that you are delivering a lecture in a war zone...Among your listeners are people whose cities and villages have been first plundered, then burned and leveled to the ground, whose daughters and sisters have been raped, whose fathers and brothers have had their throats slit. The topic of the lecture: a Christian attitude toward violence. the thesis: we should not retaliate since God is perfect noncoercive love. Soon you would discover that it takes the quiet of a suburban hom for the birth of the thesis that human nonviolence corresponds to God's refusal to judge. In a scorched land, soaked in the blood of the innocent, it will invariably die. And as one watches it die, one will do well to reflect about many other pleasant captivities of the liberal mind...

Exclusion and Embrace, p. 204