Om Swami
Why do I get angry at some people and not others?
Anger is not blind; it measures the other person
Anger blinds a person, yet anger itself is never blind: it appears according to the other person's strength. Ignoring this brings stress, fights, tension and conflict. To control anger, first go to the root cause, which lies in two things, and the first is ego.
If you know that the person standing in front of you is stronger than you, you would not be angry with them. If you know the other person is weak and would withstand your anger, then you will be angry.