"Was it an abuse of power, probably.
Was it excessive force, probably.
However if the subjects had surrendered to the authorities, it is probable that no one would have died."
Yep. In fact, if all of us would just roll over and play dead then the AUTHORITIES wouldn't kill us (nor even any of their own, as is what happened on that roof in Waco). Ah, yes, if only we would live as compliant sheep all would be well. For them anyway.
Or, well, maybe not always. Have you read of those people whom the batmen gunned down for no reason, many of them not even being the intended target of their "proper" abuses of power?