If the dream of killing people is to defend themselves or protect others, it may represent the determination and courage to protect and support others; If you kill a familiar person, it may imply that there is a problem with the relationship with this person; If you are killing a stranger, it may represent your concern about your insecurity and strangeness; If you are killed, it may mean inner fear and vulnerability.
It should be noted that the dream is only a symbolic hint, so we don't need to pay too much attention to it, let alone over-interpret it and influence its behavior.