Is the urge to kill normal

Okay starting when I was about 5 years old I started having dreams of people I didn't know. In those dreams I would always kill them sometimes in the worst wayou imaginable. Ever since that age the yearning to kill a person is becoming almost unbearable. For the most part im a really calm person i dont get in to trouble and almost never get angry. Is it normal for me to want to kill a person for no particular reason???