One can only face in others What one can face in oneself. Irrespective of what they do to you, if you remember that all beings like you are only trying to be happy, you will find it much easier to develop compassion towards them.
Anger is an emotion with great destructive potential.
It rises hot in our blood and can stir us to unfortunate action. It clouds our vision, cuts us off from the object of our fury, and drives us to do things which we may later regret. It makes us a source of worry to others. Anger makes us think we feel strong, but it is a sign to others of our true weakness. When it is chronic, it shows how little power we have, or how out of touch with our power we are.