I used to feel the same, and there is some catharsis to it, but the depressing reality is that mental illness and crippling poverty are often a factor to situations like this.
It's a sad situation, but I definitely wouldn't want to reason with an armed person with possible mental illness, as you described. Better safe than sorry, particularly in these cases. No innocent life in that building going about their work day should be subjected to even the tiniest of chances that they wind up dead because of someone like the perpetrator.
I respect the thought process but better safe than sorry when talking about human life and death leads us to kill 100 innocent men just to get that one bad one. Not worth it to me.
None of us said we had a problem with an attempt to save lives, we were pointing out that celebrating the robber's death without knowing the circumstances that lead him to those choices was callous and naive.
For sure, to clarify I wasnt commenting on you at all- I totally agree with your comment- what I said was directed at who replied to you.