If you're going to use a phrase in an unconventional way without doing anything to disambiguate it from that conventional meaning and in fact using language that reinforces the conventional interpretation of the phrase, don't be surprised when someone responds to the conventional meaning.

Sorry I was not clear. I agree with you, what Rudolph did was not a case of muscular memory. But there are other people in this thread who may disagree. For me, it was his excessively paranoia but still, his surprise it is a little weird. I thought TWG had made him shoot but I realized I was wrong because it would interfere with his free will. Still, conditions were created and probably He (They) guide the bullet, leading to an injury that gave her enough time for a goodbye without making his suffering too long.

Perhaps the surprise was because Rudolph knew he was pointing to another place and the bullet trajectory felt weird, as if in "Wanted".

That falls among the dumbest things he has ever said.

Not totally on his own, just entering a new phase.  In the new phase it looks like the Holy Knights and fatherhood are going to play a huge role.. So out Murphy, in Michael.  The Winter Court is becoming more important, so out White Council in Mab.. White Court seemingly more important, so out Thomas, in Lara..

How is it irrelevant?

You said that death of the mentor was due because of structure. Commenting on the fact that death of the mentor isn't part of the structure of the Hero's Journey, which is what people are usually referencing when they discuss the death of the mentor, is relevant.

Structurally, the death of the mentor isn't part of the Hero's Journey. Also, basically everything could be a mentor. In my opinion, the Hero's Journey is so vague as to be useless as any sort of analytical framework.

Wow this was a roller coaster of a thread.  Here is how I read the scene:

Once Murphy is shot and it sinks in.  A switch is thrown in Harry.  You can tell by the way he is talking.  They're trying to get him to stop and he's dismissing him with the same tone that someone would use to say "Just let me wash my hands, then we can eat."  That is the emotionless logic of a sociopath who treats murdering Rudolph has a banal task he needs to complete.  The holy lightsaber, which Harry could pass his flesh through previously while feeling just a warm buzzing sensation now sears his flesh as if he is pure evil, which he is that that moment.  The sword then has the same affect on harry as it does on the monsters.  Once Harry snaps out of it, Butters could have pushed the lightsaber through him and it wouldn't have harmed in again.  Harry is going to have another scar on his arm that reminds him not to become a monster.  The sulfur smell was the signal that Harry was seriously in the wrong, I don't think it has anything to do with an outsider influencing Rudolph.  It has everything to do with Harry being evil in that moment and the sword telling him a resounding "No."

The time line may be off, or in the earlier short stories Harry is wrong, because I was rereading some of the short stories while waiting for Battle Ground to come out and in one of them Harry describes Murphy and says she is about five years older than himself.