"Why is it I don't like those people? Why are my feelings about them so negative?"
Observe a person you do not like and try to find a similar state with yourself. Imagine yourself in the shoes of that person and search for a time when you felt that way, looked that way, or spoke that way. If you see that person doing something that you feel you would never do, look for it in yourself. Look for something similar, a like emotion, thought, or habit, that perhaps expresses itself in a different way. Your dislike is showing you something about yourself. It is a mirror for you.
Other people who can do a lot for you are those people who dislike you. You might wonder why they dislike you. What is it about you that they find objectionable? How could it be? What is the nugget of truth within their disliking of you?— Peter Rhodes in Observing Spirit