2. There is no evidence that any prevention of crime was gained in exchange for the deaths of these innocent unarmed people. If anything it created an environment where the law is respected less.

I mostly agree with this, but there needs to be an effort to hold people accountable when mistakes are made, and to change processes to help ensure that these mistakes don't happen again, or at least happen less often. Police departments across the US seem near-violently resistant to this.