Question: Why does Michael want to kill his niece?
ChristmasJonesfan
20th Aug 2020
Halloween 4 (1988)
Answer: It's tricky to say, as the films have contradictory explanations, and there are different "timelines/universes" in the series. But in the context of this film, Michael is for some reason compelled to kill his family for reasons unknown. Presumably he's just finishing the job he started by killing his sister Judith decades earlier. (They try to give a more concrete explanation in the movie "The Curse of Michael Myers," but it's... flimsy at best. And is contradicted by the following film).
Answer: Because he's a psychopath. And purely and simply evil.
Answer: Thank you.
Rob245