I know I’m not the only one who has thought about it. In Halloween 1 after Loomis shoots him he just stands there and does nothing. In Halloween 2, Loomis just got a slight stab in the stomach with a scalpel. In Halloween 4 at the gas station he just escapes in a truck without killing Loomis. Later in Halloween 4, when Loomis and Jamie are in the schoolhouse Michael just throws him through a window. In Halloween 5, Michael slashes his stomach, smashes his head through a window, and then throws him over a railing. He’s had plenty of opportunities to kill him. Why do you all think this is?
I think it’s kinda implied that he is killed in the curse of Michael Myers. You hear him scream real loud at the end
Michael seems to show some restraint when he deals with Loomis. I think it may be because of those 15 years in the sanitarium, from such a young age of 6 years, maybe Michael, somehow, developed a sort of…dare I say it…‘fatherly’ attachment to Loomis, at least to some degree. That, or perhaps he feels a somewhat ‘friendly’ connection to Loomis.
Uh, well he stabbed him in the gut with a scalpel in part II, attacked him in the school scene in part IV, slashed him across the torso in part V then smashed his head through a window, and of course in part VI it’s heavily implied he killed him when Loomis went back into Smith’s Grove at the end; so he certainly attempted to kill him, then finally did so.