Forgiveness is not about minimising evil. It isn't pretending that the wrongs done somehow don't matter or that the perpetrators can avoid the inevitable consequences of their actions. Forgiveness is the hard, brave, powerful decision not to let yourself be defined by the wickedness of others.
Jesus lay with his lacerated back on splintered wood and watched as a drunk Roman Legionary with one hand held a nail against his wrist and with the other swung a mallet. In this moment of fear and pain he chose not darkness and anger, but the light which had guided his young life to this point: Light which would in only three days be shown to have triumphed over the darkness which sought so brutally to overcome it.