When I see guys like that I wonder why one would ever vote on a jury to convict any accused based on evidence offerred by a police officer? They seen either untrained or inclined to break the law?
Like any section of humanity, some of them suffer from stupidity or ignorance. Of course those are the ones that tend to get their stupidity captured on video for all to see.
I used to shoot at a shooting range that was owned and run by current and retired police officers. I also have a couple closer friends in law enforcement. They are amazed as we are at some of the stupid things that fellow officers sometimes do, but the vast majority are not this stupid and are generally respectful of people's rights.