I'm with you all the way about cops - but I've also got it in for bicyclists. I mean, riding a bike is fine, insofar as one feels the need to do so and addresses said need, but if one feels the need to make a big production out of it - buy the ticket, take the ride. It's like these motorcycle-oriented fund raising events - people think they should have their butts kissed for doing as they please.
I don't mean to defend the cop - as a person, as a figure, the institution that operates them - but the bicyclists were zipping by them, looks like he started for the curb and the victim tried to go between him and the curb, more or less asking for it. Everyone in the video was there to start ****, and what might, to my mind, be the script that led the cop to do his thing is more in keeping with a homeostatic condition in that place and time - that is to say, insofar as such a thing as a cop exists, the cop was being a cop, while insofar as such a bicycle-protester exists the smart-ass was being a smart-ass.
I wish I could add a Venn-diagram for to illustrate it - it's not the 'going out of one's way to make a point' part, it's the script that like-as-not leads up to that kind of behavior in the sense of liberal values and the ramifications thereof. Like depending on the objective, is it peaceful assembly/free speech or passive-aggressive strong-arming? Only one interpretation exists as such relative to the Constitution and rightly so to my mind; protected as all hell - but just because it lacks meaning in the legal sense don't mean the discrepancy is a moot point, as the following illustrates...
Group of bicyclists attack driver in Seattle