Death for acting threateningly is a pretty ideal outcome.

I suppose idealness of outcome is a matter of opinion, I can amend this to 'most people would not consider this an ideal outcome' as evidenced by the fact that acting threateningly alone does not ever result in the death penalty from the justice system. This isn't within societal norms of what ideal justice looks like, which is why people are upset. But ideal isn't what you get when you gut public safety