"Survivalist". Root word: Survive, which means "to live, to overcome adversity."
I'm pretty sure that it doesn't mean: "The act of spending eight years building a bunker with one way in and out, and then, after committing a heinous crime and disclosing the exact location of said bunker though poor opsec (operational security), giving up without even a token fight and shooting yourself in the head when the police show up."
Peter Keller, if there was a prize for failing, you'd win it, posthumously, of course.
Murderous moron kills self in underground bunker.
I don't feel bad in the slightest that this loser is gone, but I do feel bad for his two innocent victims, one of whom was still a teen. And of course he has to make us gun folk look bad on his way off the planet. Good riddance to him, I say.