Experiencing anger in dreams usually reveals a level of emotion that the dreamer is not fully aware of.
Dreaming you are angry to the point of killing someone in your life may be cautioning you to deal with the real life pressure you are feeling before an explosive episode brings a ‘death’ or an end to a relationship.
Anger is a feeling that many people are uncomfortable with, but it is not ‘wrong’–unless it gets out of hand and causes damage. It is an indicator of an issue simmering inside–it may even be over a good cause, but often we will receive a dream that highlights a potentially toxic level of anger so that we can make a change before we make a painful mistake.