De nada, Mr James.
Like I said, though, I don't presume to have the answers for anyone else.
Matters such as this ought to be horrific by nature to rational human beings.
They're deserving of some careful, sober and contemplative thought before we arm ourselves and consider ourselves prepared to face the potential eventuality of taking a human life.
I spent shy of 3 decades in LE and have pursued an interest and involvement in the martial arts for just shy of 4 decades, so I've had opportunity to give these matters some thought. Being a parent, and now a grand parent, lends another perspective, as well.
Retired LE - firearms instructor & armorer