Unlike President Obama, I will not comment (or attempt to qualify or retract a comment) regarding a situation about which I only know what I’ve read or heard.
Generally speaking, however, it is folly to express anger at a police officer when he is in the process of doing his duty as he sees it. He (or she) is probably going to arrest you. If the situation calls for indignation, better to have a lawyer express it by filing a lawsuit after the fact. You’d think that prominent Harvard professors and public intellectuals would know that.
A quick anecdote to illustrate my meaning: About a year ago, we were stuck in Atlanta rush hour traffic on our way to a friend’s house for dinner. As we were crawling past a state trooper who had just pulled over an SUV, the driver of the SUV did someting incredibly stupid: instead of waiting for the trooper to walk up to his car to ask for his license and registration, the driver got out of his car and strode purposefully toward the trooper while reaching into his pocket for his wallet. Of course the trooper immediately pulled his gun and got behind his cruiser. He didn’t know what this guy was going to do and did what he had to to protect himself and gain contol of the situation. The stupid driver of the car--as an eyewitness, I can use the adjective quite confidently--ended up spread-eagled on his car being frisked and receiving a very pointed lecture from the trooper about how he’s supposed to behave when pulled over. (Yes, traffic was that slow; I saw it all.)
The bottom line: police officers have a life-or-death interest in being in control of the situations they face. Those who are in those situations have a life-or-death interest in being cooperative. I know that, but, then again, I’m not an intellectual "Master of the Universe" (apologies to Tom Wolfe).