If we had the capacity to see future lifetimes we would find that the energy that goes to the future lifetime is basically the way we have acted, the habit patterns we have gotten into. In that way there is just a new energy pattern again doing it's thing, fluctuating and changing. It is not the real essence of our being. In that way try to refine or upgrade the way that you interact so that your energy is upgraded, that you are more in harmony with your inner being, you are more at peace with yourself and you feel good about yourself, a positive reinforcement. Just touching on the positive aspects of anger.
Anger is useful.
For example, if you think of this as a large pool of water and there is a particular color. A drop of black ink into water and it turns into a cloud. It colors that part of the water. Maybe they are self centered and very obnoxious. Or in some way they are not in tune with reality.