This I STRONGLY disagree with. LE should qualify their presence, and for BLM protests, that qualification is evident. To use LE as a threat, is NOT the way to go. Nothing good can come from that posturing. Safety of self, the public, and property....that's it, that's our task, not to be a blunt object to pummel fear into our citizens.
I know you're pissed and speaking from emotion, but let's no lose sight of what we do and how we do it, properly.
But this in and of itself represents the problem with scaling individual motivations up to a group, or scaling group motivations down to individuals.
If you're doing crowd control at a large event, do you care whether the next officer down is doing it to project authority or as a service to the city? How would you really know why he/she is doing it? All you care about is whether they'll make the right decisions, right?
We can't regulate people's motivations. We just can't. Its impossible.