Leadership produces adversaries. Adversaries can produce animosity, anger, even hatterd within yourself, and allowing these emotinos to have a home in your heart is self destructive.
Don't hold a grudge. It takes up room in your heart, it takes up time in your life and it takes up space in your mind....Let it go. Let others hate and be hurt, don't do it to yourself.
Remember what Mother Teresa said, "Forgivemess will set you free."