There have always been those who don’t like the police. Often, they’re criminals who see police as their natural enemies. That view makes sense to many people, even if they vehemently disagree with it. They don’t like it, but they get where it comes from. Criminals are thwarted by police and sent to prison, creating an antagonistic view of law enforcement. Again, it’s easy to understand.
However, there have been some who just don’t like police for whatever reason. That’s generally fine as well. Police don’t require your affection to do their job, after all.
Yet as police have been maligned over and over again in the media and by the rich and famous, it was only a matter of time before anti-police sentiment manifested itself as violence.