I have mentioned this and blogged this many times. This is something so known and simple, yet not grasped. Love. The greatest commandment is love. We are to love God with everything and we are to love everyone else. Simply said by the apostles, by Jesus Christ, and by God. If God commanded us to love wouldn't doing the opposite be out of His commands? Why would anyone justify hate anyway? Let's say you have the option to hate someone for whatever reason, why would you do it? Would that change anything or any situation? So you say, you don't hate but you are just angry. Anger doesn't solve anything or bring about change either. It says in Proverbs 27:4 "Mockers stir up a city, but wise men turn away anger." I am not saying I don't get angry and that if someone gets angry they go to hell, but it's hard to live in happiness when you wallow in anger. When you are always angry with people, you open yourself to do and think in the way of the flesh. Galatians 5: 18-20 says "Now the works of the flesh are manifest, which are these; Adultery, fornication, uncleanness, lasciviousness, Idolatry, witchcraft, hatred, variance, emulations, anger, strife, seditions, heresies." We are to stay away from the things of the flesh to have peace in our lives. It says in Galatians 5:17 "For the flesh sets its desire against the Spirit, and the Spirit against the flesh; for these are in opposition to one another." It's much better and easier to see someone who angers you, to pray for them and hope that they come to know Christ or to know Him better. Your first thought would be that that would be too hard but actually once you get started praying and loving it makes your life so much better and peaceful.
Christians, if you are struggling with anger( or anything) and someone points it out to you, don't allow it to hurt you or make you bitter, instead embrace it. You are the clay and God is the artist. Allow Him to push and pull to make changes in your life so that you can grow. Open yourself up to the truth.