The Pursuit of the Extinction of Evil Hauntings Within...or Without?

I have two DVD collections -- one of which is Halloween: Curse of Michael Myers series. Every Halloween I try to watch at least one of the Halloweens. The simple theme-music alone gives me chills. I honestly do not know why but Dr. Loomis' symbolism continues to pull me in.

Why does he bother? He's been going at it for years! The crazed doctor chases and shoots Michael over and over with no success but he keeps on going despite being caught afire and mutilated!

Loomis quotes from H1:

Loomis: I would suggest a maximum security ward...not a minimum security institution...he has an instinctive force within him...he's waiting...
Medical Board: (waiting) for what?
Loomis: I don't know....There is insufficient security here....
Medical Board: ...perhaps someone else should take on his care...
Loomis: ...I'll stay with him....
++++
Loomis (to Michael): You fooled them, haven't you Michael? BUT NOT ME...
++++
Loomis to nurse: understand what we are dealing with here...don't underestimate IT....
Nurse: Don't you think we should refer to "it" as "him?".
Loomis: ...if you think so.......
"HE'S GONE FROM HERE! ...HE'S ESCAPED...THE EVIL HAS ESCAPED!!!"
++++
Loomis on Phone to Haddonfield Police: He's on his way...you better believe me officer, he's coming to Haddonfield...(why?) because I KNOW him...you must be ready for Him...if you don't (then) it's your funeral.
++++
Loomis to Policeman: This is NOT A MAN!!!
Policeman: You seem just plain scared
Loomis: "I met this six-year old child with this blank, pale, emotionless face, with the blackest eyes. I tried for seven years to reach him and another seven trying to keep him locked up because I realized that what was living behind that boy's eyes was simply and purely evil."
++++
[Loomis Shoots Michael]
Laurie: Was that the boogeyman?
Loomis: As a matter of fact, IT was.