Bad people do bad things, sometimes with a gun. Ill people sometimes hurt themselves to escape their hell. Sometimes with a gun. It’s all very terrible. On that I will readily agree.
I am a human. I live and breathe and because I do, I have natural rights no other human has the right to deny me. One of those rights is the right to self preservation. Every one of my fellow humans has the same rights and I have no right to deny those rights to them either. Provided I do not attempt to deny another of his or her right to life, no one is entitled to my death and vice versa.
Imperfect people and imperfect circumstances sometimes end in imperfect outcomes but this never negates my natural right to life.