You haven't even watched the video. This was not a "traffic stop", these people had friendly interaction for nearly a half-hour. He had been searched and had his id run, and at one point at least one of the cops allowed him to move his car. All of that occurred before the second officer arrived because the first officer wasn't even sure if he was legally intoxicated.
It was after the 2nd officer arrived and he blew over the limit that he was even arrested. They tried to cuff him, he struggled and grabbed a taser and tried to run away, and in the ensuing foot pursuit fired the taser at Rolfe who then shot him. He didn't injure anyone in a DUI,so there is no reason for anyone to be anymore enraged at him over a DUI than any of the other thousands of people who commit that crime daily in the US. Plenty of people get away with DUI daily, and the only time anyone who has lost a loved one is even made aware of that happening, is if that driver subsequently injures/kills someone while driving drunk.
This claim that Brooks would have done that is fantasy. He wasn't driving on a suspended license and hadn't been stopped for DUI previously. So this isn't a 3 or 4 time DUI offender who was "released" and struck again. Why in the world would victims of DUIs be legitimately more upset over Brooks being released in Atlanta than they would over a business guy from Duluth being released on the same DUI charge? Unless of course, they were racist in how they viewed black vs white on the issue of DUIs...