Its tragic the loss of life in this vulgar way can be hand waved away in a civilized country. It's a double dehumanization of victims, one to allow this callous behavior by the police and the second to justify it and let it stand. Often juries release brazen case of murders and elected justice officials support the police by default so its not just the police but the entire justice system that enables this cycle of murder, terrorism and violence.
What is also unique is the support and justification for this kind of policing by many who do not experience the same behavior from the police and infact can count on them to 'protect' and defend.
This is intimately linked to privilege and racism and how the police have been used systematically to harass and terrorize minorities right from enforcing segregation, laws like jaywalking against mostly black people, suppressing the civil rights movement, the drug war, demonization of blacks by administrations like Reagan who ran systematic advertising campaigns linking black populations to crack. [1] [2]
[1] https://en.wikipedia.org/wiki/The_New_Jim_Crow
[2] https://www.nytimes.com/2018/01/18/us/new-jim-crow-book-ban-...