I had always found this a hard thing to do until I read a book and study guide by Ted Dekker called The Forgotten Way. In it, he explains the truth of who I am as a child of God. With Him in me, I am complete and I do not need to fear anyone or anything. Often, anger is our response to fear. When we don't have any fear, we can love the way God intended us to; like He does!
RE: MATTHEW 5:44 "LOVE YOUR ENEMIES"