There are quotes about this below the cut just in case you're wondering why I'm asking this question.
"If you hate a person, you hate something in him that is part of yourself. What isn't part of ourselves doesn't disturb us."
~Hermann Hesse (1877 - 1962)
"When others talk about us, they are telling us about themselves, and what we especially dislike about others we fear in ourselves."
~Stanley J. Gross, Ed.D.
"We hate most in others what we dislike about ourselves."
~Laurrel K Hamilton (Narcissus in Chains)