The only interesting thing about this entire circumstance is why these incidents, out of all others, receive massive media and social attention. Specifically referring white on black, or police (police being seen as a stand-in for the white community) on black.
We know for a fact that, after accounting for their increased interaction with police, black people aren't victims of police violence at rates any different than any other race. We know for a fact that white on black violence happens at a far lower rate than other types of interracial violence.
So why the outcry? Why do unlucky black felons on the wrong end of violence from the state become folk heroes? Why does BLM protest the type of violence that least impacts the black community?
My guess is that a form of anti-white racism was allowed and encouraged to thrive in the wake of police shootings in the early 2010s, and yes, even in the wake of the civil rights movement itself. Hating whitey has become a regular cottage industry for these folks, and they are given a platform to spread their views. As a result, any incident is blown substantially out of proportion.