Anger is a healthy emotion. It is not the same thing as rage and violence, but it can lead there. Anger is not necessarily unhealthy, but repressed anger certainly is. Anger is a behavior as well as an emotion. Men respond to loss with action.
Anger is an act.
However, anger can and must be controlled . Some of us have homicidal ideas. Thoughts of revenge and retaliation are to be expected. Acting on them isn't. Anger can amplify feelings like guilt.