Thats a wildly different thing than ascribing dogs the mental capacity to make a moral choice such as joining or not joining the police though. A dog is entirely just what the people raising and training him make him to be.

No police attack dog wants to fuck you up for protesting, they do it because their police human tells them to and they feel their pack/family threatened, and they have learned that is what they should do if their human gives that command. But they never chose that, or can even comprehend the morality of the situation.

So they could never be considered responsible, or legitimate targets. Only harm the animals if you absolutely must to protect yourself.