Comparing deaths from warfare and capitalism to human sacrifice is a bit silly. Comparing the death penalty - not so much. You're making a distinction between a sacrifice performed to appease a deity versus sacrifice to appease a cultural moral code or a psychological need for justice. I am going to suggest the line between this distinction is a lot smaller and grayer than you believe. If you want to say I am taking this thread on an unnecessary tangent from what the OP intended, well ok. But I stand by my premise, at least to the extent it provokes thoughtful discussion on the nature of sacrifice and crime & punishment.
Actually, I can accept your point about capital punishment, especially when it was a public spectacle, or even now when it is witnessed by families of the victim and criminal and is used to an extent as a "lesson". I was reacting to your general use of the term "law and order", which I interpreted to be a much broader inclusion of any police action that results in the death of offenders. In fact, I had the excessive use of deadly force by police officers in mind, not capital punishment, when responding. Whatever else Ferguson was it was not "human sacrifice".