Your conscience is telling you to treat others better.
Generally, to see a wound in your dream, is symbolic of grief, anger, and distress. You are looking to be healed.
A dream of killing your ex's family suggests a great deal of wide-ranging anger. The dreamer may not recognize suppressed feelings that the family is to blame for the break-up. Paying attention to this dream and working through the anger could prevent some unpleasant incidents.
This dream expresses anger that the dreamer would never express violently in real life. The dream serves as a way to release the stress of pent-up anger, and as a way of alerting the dreamer that the anger exists.
The dream suggests that you feelings about this person are rather confused. If the person does not return your love, then the dream expresses your anger with them for rejecting you. If the person is a risk-taker, the dream expresses your concern and anxiety for them, in addition to the anger you feel for them not taking care of themselves.
One possible interpretation is that the dream expresses your deep anger toward that particular person. On the other hand, if this "someone" is a stranger, it could represent anger you have toward an aspect of your own life, such as a characteristic you dislike in yourself.
The fire is a symbol of your own emotion. It might illustrate your anger or your "burning" passion.
This dream shows that the dreamer feels anger and resentment regarding his future plans, failing opportunities or lack of good prospects.
The "someone" in this dream might represent the dreamer's own self. The "killing" is a metaphor illustrating the dreamer's anger or disappointment with one's self.
This dream illustrates the dreamer's feelings about the ex. It might mean that the dreamer continues to have affection for the ex and is worried the ex might be emotionally wounded. Or, it could mean that the dreamer has deep anger toward the ex and the stabbing reflects that anger.
If the dreamer actually killed someone in real life, then dreams about that person, the dream suggests feelings of guilt and remorse. If the dreamer only dreams of killing someone, the dream suggests anger with that person.
The dream expresses pent-up anger and frustrations that the dreamer cannot act out in reality. The sister in the dream probably symbolizes someone or something else, which could include the dreamer's own self.
The dream expresses the dreamer's own deeply felt anger and hostile emotions. By locating the violence in images of random people, the subconscious mind removes the dreamer's responsibility for recognizing and confronting one's own anger.