First of all, thank you for your response. And I promise not to go on and on in my response, although there are so many important points you raise.
Per the door ..... obviously, I don't know the answer ..... but I do know that stalkers who focus on terrifying their victims will do things like leaving a door ajar and/or opening a window, to demonstrate that they have the ability to strike when they know you are not home. A related tactic for late night intruders, when the residents are asleep, is to move some furniture. Thus, even if you might have left it that way, there is no valid reason for the police to have not responded.
I agree the Idaho murderer has psychopathic features. His history suggests that it is a real possibility, even a likelihood, that this is the correct diagnosis. Yet there is another potential possibility ..... it is possible that he has two other diagnoses that, at times, not only can mimic psychopathy, but have a curious history of being in play when a killer prefers a knife to a gun. I have discussed this with a few people who are not on DU, but hesitate to do so here ..... lots of very good people have one or both of those conditions, and pose zero danger to family, friends, or the public at large.
One of my friends I talked to about that reads my posts on DU. She reminded me to tell people to always be aware of their surroundings. In the past, I've mentioned that in the context of situations like pulling into a grocery store's parking lot, as there are maga types with chips on their shoulders. It's something that I taught my kids to do since they were young. Not to be paranoid, but to be alert and aware.
Again, thank you!