I think the cop acted inappropriately here. Probably should have been fired (but resigned). However, I have a problem with the amount of media coverage of this case. No one was actually hurt. There are about 100 cases of officer involved killings per year in this country. Only a fraction get national attention. But this case gets national attention.
That case in Oklahoma where the white minister was shot and killed by police last week is in the media but the coverage is far less extensive. Common sense would dictate that an officer involved killing would get more press than an incident of this type.
I think the media whose desire is sensationalism is seizing on every incident it can find involving police actually or allegedly abusing/hurting/killing black people. The element of race makes it incendiary which is why the media is so interested. I know conservatives think it's the media's "liberal bias" but not such explanation is required - the element of race automatically makes it controversial - it causes people of all ethnicities and political persuasions to tune in and read. If race is involved, everyone has an opinion.
Unfortunately the media is aiding and abetting a lot of racial tension in this country right now by giving the impression that there is a wave of racially motivated police violence against blacks, when in fact there have always been some incidents of it, every year, some where the cops are guilty and others where they are not. There's bound to be in a nation with over 2 million law enforcement personnel.
So here we have one cop who was a hot head and shoved some black kids around. Probably should have been disciplined if not fired, and resigned. OK. There are probably worse incidents of police misconduct that occur every week if not every day in America that we don't hear about. I think this incident has gotten as much press as it deserves already, if not too much.