In the world of therapy there is a concept called "anger management". This is a precise definition because it implies that anger has a place but it must be managed. It should not be completely erased. If someone never gets angry then he has a REAL problem. It means that when he hears of evil that has been perpetrated it doesn't bother him. Anger shouldn't be expressed in violent ways but the emotion has an important place in the range of human emotions ואכמ"ל.
HUUUUUGE yesod for life.
