That is the kind of anger Jesus says to get rid of. Most often because somebody got angry and went out of control. I have not killed anyone, but I frequently get satisfaction out of obituary notices. The root cause of most murder is nothing more than anger. No wonder Jesus came down so hard on it.
Anger is dangerous.
Obviously, murder is not the only outcome of anger. Other harm can be done as well. Angry words can wound with insult. It has happened to most of us. Let me tell you about my grandmother, a shy and sensitive lady who lived to be just three weeks shy of her 100th birthday.