Evil can only exist if you are thinking of yourself. Good and bad ultimately resolve to "I like" or "I don't like". Without "I" there is no liking or disliking.
People think of self as different things, the body, the brain, the mind... Self is just a word. It means what people think it means. It is an opinion. When you notice how many unpleasant emotions disappear when you stop thinking of yourself, you realize that self is an opinion, an option, an illusion. Noticing how unpleasant emotions disappear provides positive reinforcement that can help condition you to dispense with the idea of self.
That doesn't mean you should indulge in uncompassionate actions or ignore uncompassionate actions by others. It means you can act out of clear sighted wisdom and compassion unpolluted by anger. And it doesn't mean you don't feel compassion, it means you feel compassion for everyone not just some people.