That ethic is appropriate to soldiers in a war zone - not to civilian police.
If you’d agree that we live under a de facto military occupation, that we could see eye to eye on, if never the appropriateness of gunning down an unarmed civilian in the street for the capital crime of failing to stop when ordered to do so.
She behaved like a terrorist. They did their duty. Get over it. And when you have a chance, visit Washington, observe the streets for yourself, and try wising off to a police officer. Watch what happens.