There is no handy videotape of the outrageous pressures placed upon California government over the past 10-15 years due to population increases. Population has expanded faster and more extensively than the state's infrastructure could adapt. Many people came to settle in California in recent years for no reason other than greed. The state's natural beauty, economy, and quality of life has been marred. This is why people prefer to build prisons here rather than schools, and pass criminal law initiatives like Prop 115.
People have little time or patience to take backlip during traffic stops.
If governmental abuses send a message to people to not abandon their other homes for the Golden State, then people of California may be willing to send it. The frustration in the police ranks from these above socio-economic anomolies might have trickled down into the beating of Mr. King. The poisoned carrots which the credentialized hierarchy throws to the police and raw power over relatively defenseless people under color of law, and rewards for successful rights abuses of their opponents.