The issue is a system that makes low IQ as a requirement to join the force. Sounds like the dumber the better, so they will act without thinking and will comply with orders no matter how stupid those commands may be.
Obviously this. The good cops, few and far between, keep their mouths shut or they will quickly lose their positioning in the thin blue line. From my dealings w/ law enforcement, I've never had a negative one that I can recall. When they're in civilian mode and not ginned up on SWAT tactics/adrenaline, they're usually pretty decent. That said, I think these guys need to have CJ Bachelor degrees and no former military personnel that saw active duty.