That's because your perception is skewed. There are millions and millions of traffic stops in the US per year. It is an extremely small percentage that have such a negative outcome.
I'm not saying that everything is ok. It clearly isn't. But most people are peaceful about it because most people don't have interactions like these with the police.
The percentage that have negative outcomes is way too high. And there's an indisputable pattern of this behavior being positively enforced by the lack of accountability. It also disproportionately impacts people of color. Even if the percentage of cops who assault people during stops is low, the number of complicit officers is high, and thats part of the problem.
One of the most frustrating details that often come out when these events go viral is that the officers involved have abnormally high complaints about use of force, but the the department almost never substantiates the allegations. It's almost as if the suspected party shouldn't be responsible for policing themselves because there's an inherent conflict of interest.
Yeah this is pretty interesting. There's still a racial aspect that I don't feel he's covering, and the whole fucking mess that is just officers taking the job to abuse authority, but I do wonder how much of current cop behavior is a result of poor training. I imagine using stuff like the Kyle Dinkheller incident as training material can teach the wrong lesson.
There is a racial aspect, but simply complying with protocol would atleast minimize the impact of escalation, even if the stop itself is racially motivated.
Like, implicit bias will be difficult to root out, it's DEEPLY ingrained in this nations fabric, but if they could atleast hold officers accountable for not doing their job properly and unnecessarily endangering people, thats a start.