Righteous Anger

Captain Sensible writes: Anger. It's very easy to condemn anger, and rightly so in many cases. But it's also important to acknowledge that it is one of the attributes of God, Who hates injustice. Anger is a Godly motivator to bring about change. Anger itself is neither good nor bad, but can be used as a force for both.
In some ways, it's like sex: Sex can be used to glorify God within marriage, or it can be sinfully violated.
So, next time someone tries to criticise you for being angry, maybe the correct response is to be glad, say thank you, and tell them how pleased you are not to have a lukewarm response to injustice, false teaching and the leading astray of the Body of Christ.
Here are just a few examples of righteous anger, but of course, you don't need to look far in the Old Testament to see many examples of God expressing anger...

John 2:13-18

Matthew 23

Mark 3:5

Galatians 2:11-14