The fundamental basis for granting a citizen power over other citizens is trust. Trust that those who we grant this power to will 'serve and protect' (remember that old tag line? it used to be right on the 1-A-12 car door when I was a kid) the other citizenry.
I really, really hate seeing guys with badges who use those badges to abuse others. There will always be individual rogue cops... but where is the condemnation from senior LE officials? Without it, the public perception is that all cops are like this and these two were just unlucky and got captured on video. Shielding cops who have been virtually proven to be rogues is one of the primary reasons for the erosion of trust in LE that (at least some) used to have in them. These two have to lose their jobs.
Good cops everywhere should repudiate these two thugs. If they don't, nobody will ever trust them as an entity.
There's a saying that power corrupts. Let's hope the parked man gets justice (lots of $) and that the police officers involved get suspended.
One solution to help alleviate this phenomenon would be to alternate their partner (restraining familiarity) and maybe have the officers wear tiny camera/mic on them at all time. Hey, screw privacy concerns, I don't trust anybody with guns, period. I wouldn't trust my mother with a gun even though she is an angel.
This appears to be another great argument for a mobile camera permanently mounted in your vehicle. Think about it - it was a matter of luck that this occurred near his home, that a neighbor had a "hidden" camera, tghat the event was within the camera's field of view, and that this video evidence was accessible to him. It's great that it worked for him, but do the rest of us want to depend upon this kind of luck?
Cops are human, with all the warts of humans. No matter how exemplary our police force, there are going to be a few bad apples. IPVM has shown several cases in which video evidence has been the "new" great equalizer. This is a pleasant change from the wild west, where only a Colt .45 would do.