Only if you narrowly define racism as a white person pointing to a black person and saying, "hey monkey, I hate you. I'm gonna lynch you!". Even within that narrow framework, as late as 50 years ago, police forces were openly and proudly racist, enforcing segregation laws, and turning their backs on lynching and other targeted attacks on black folk. As late as 20 years ago the O.J. Simpson trial uncovered a systemic terrorizing of the Los Angeles black community by the L.A.P.D., who threw epithets casually and planted evidence and beat the living shit out of suspects. Pretending as if all that just magically disappeared in 20 years is naive, at best. From there, other options are varying levels of insults honestly.
And that ignores the fact that racism is not just targeted individual attacks on someone who may be of a different color, and defining it as such makes the vast majority of people who are complicit in a broken system pat themselves on the back for not calling their black friend (cause we all know they have one or two of them) the n-word.
Yeah in isolation, a cop shooting an unarmed motorist may not come down to racism. The cop may have been trained improperly. Prevalence of guns in the US may have him on edge. Looking at the numbers though, after normalizing for wealth, class, education, age... black people and other people of color are targeted, profiled, threatened and killed more than others. That is racism. Which is why there is an outcry everytime an incident like this happens, even if the victim may have not been "perfect".