Answer: It is because you feel that you are an egoist, and you are unwilling to accept it internally.
This aggression gradually will switch to love of people, but it will take a long time and many years of studying the wisdom of Kabbalah. So I recommend you start now since, otherwise, you will not be able to get rid of this aggression.
You are the one who suffers from the fact that you are so aggressive toward people. You hate people and relate to them harshly, and hate yourself because of this attitude. You don’t want to be in this position, but you cannot get rid of it either.
From the Kabblah Lesson 9/27/15