If they do something like that, maybe a Freddy Krueger fan, a girl, a really sick goth girl starts killing kids herself and Freddy has to put a stop to it, or they have to fight it out.
We must develop and maintain the capacity to forgive. He who is devoid of the power to forgive is devoid of the power to love. There is some good in the worst of us and some evil in the best of us. When we discover this, we are less prone to hate our enemies.