To hate binds you irrevocably to the object of your hatred. Hating affirms your status as damaged and passively unable to help yourself. To be angry is to acknowledge that one has been deeply hurt in preparation for moving beyond the hurt. As though such retaliation could magically undo the injustice. We know it won't, but our hatred whispers otherwise.
Hatred is sick self-soothing.
Hatred is the refusal to grow up into the realization that the injustice may be irreversible and that it's our business to deal with it realistically. At a fundamental level, hatred is a failure to let go of a wound to one's very sense of self. Hatred is self-splitting. To hate is to make someone else responsible for dressing your wounds. That's one reason why raging victims so often are found in the vicinity of victimizers.