Like any profession, the VAST majority of the people in it are average to good. A small group could be considered to be excellent, and there's always a small group of "slackers" or incompetents that are simply in the position because there's no reasonable way to get rid of them easily. If you've ever been in a management position over a number of people you know this to be true. But to be honest, it's not the "bad cop" situation that causes this anti-cop sentiment as much as it is the "bad system."
That being said, anti-cop sentiment comes from a number of sources, but IMHO it's the whole "brotherhood" sentiment that causes the greatest amount of problems for police officers. First let me prefact this with the fact that I'm not a "tin-foil" type. I'm just a regular, everyday guy that enjoys guns as a hobby, but other than that I am a pretty typical, conservative Republican, that has a LOT in common with the majority of middle-aged, middle-income Americans like myself.
I completely understand what a tough job being a cop is. It's not an easy job and you certainly won't get rich doing it. From what I can see it's about 70% boring repetitive junk like traffic tickets, domestic arguments, dealing with drunks and lowlifes, and mostly going from one call to the next. It's a WHOLE lot more exciting on TV and in the movies than it is in real life.
But what bothers people like me, and makes us regard police officer's with suspicion rather than respect and make's their jobs that much harder is the whole "brotherhood" mentality ingrained into police officers from day one. Let's take the Chino police officer's shooting of the airman as an example.
Florida is known as having some of the most lenient laws in the US when it comes to shooting incidents. If I happen to shoot someone I can't even be arrested unless there is probable cause that I shot inappropriately. In the case of the Chino shooting there is easily probable cause that that was a bad shoot, and CLEARLY a felony. Even though they have decided to prosecute that officer, to my knowledge he has not been booked and has not spent one single second in custody, nor has he had to post bond. That would NOT be the case for a civilian, even in my lenient state of Florida.
Now you can make all the excuses you want, but to people like myself that is perceived as an injustice, and bottom line, perception IS reality. The reality of how you are treated by the public, the amount of repect you are treated with is based on the public's perception of you....THAT IS THE REALITY EVERY OFFICER OF THE LAW MUST ENDURE.
Writing off every person that has a bad impresson of law enforcement at "tin foil types" is not going to make your job easier as an officer. Fair is fair, there's clearly one set of guidelines for how "bad" cops are dealt with, and another for civilians. That's not always the case, I know that. But there are clearly more cases of it than there should be. The recent example of the police officer killing one of his students during a training exercise is yet another example. A civilian conducting that same type of exercise that resulted in someone's death would be taken into custody, booked, and go before a judge to be arraigned. This officer was sent home and continues to be paid while charges are being determined by the department and the DA.
If you don't like the anti-cop sentiment then do something about it. YOU created it by handling offenses by officers differently than you would civilians. If it were truly just "bad cops", I could understand they just have to be weeded out...but the whole system is the problem, and that's MUCH harder to correct.