You can't understand what you hate. If you hate your enemy, you can't understand their methods. If you don't understand their methods, you are doomed to be affected by them forever. Strategists can admire their opponent for their guile and compose a counter attack because they understand their enemy, how he thinks, why he makes the decisions he does and what's going to come next.
If you hate someone, you literally do not understand them and you refuse to understand anything about them. Your pride demands this ignorance. Any guesses or predictions you may have about them, chances are, you are wrong, very wrong. No one should listen to you. You can not be an expert on what you hate. You are a novice. Actually, not even a novice, just completely clueless.
Knowledge begins with empathy.