Suffering - Inside Job and Stopping Others doing wrong with a Peace of Mind

I was wondering whether there are people who cause suffering for us?
Nobody causes suffering for you. You cause suffering for yourself by generating tensions in the mind. If you know how not to do that, it becomes easy to remain peaceful and happy in every situation. (S.N. Goenka in The Art of Living - VIPASSANA MEDITATION

What about when someone else doing wrong to us?
You must not allow people to do wrong to you. Whenever someone does something wrong, (s) harms others, at the same time,  (s)he harms her(him).  If you allow her(him) to do wrong, you are encouraging her (him0 to  do wrong. You must use all your strength to stop her (him), but with only good will, compassion and sympathy for that person. If you act with hatred or anger, then you aggravate the situation. But you cannot have good will for such a person unless your mind is calm and peaceful. So practice developing peace within yourself, and then you can solve the problem.