Do we KNOW that these women are reacting to littering, car burnouts, and stereo blasts? I ask because the latter two of the three don't usually hang around to be scolded by "Karens." They drive away.
Perhaps they were merely birdwatching, driving to visit a friend, or, as has been the case, walking from a parking lot to their own home.
"Karen" is not a term used only by blacks. I have heard white people refer to other whites as "Karens." Yes, a Karen is a certain, entitled type of white woman and you are attempting to prove racism by highlighting an event that was prominent in the news and that shows a confrontation between a white woman and a black teen. Genuine "Karens" pick on everyone, regardless of color. Generally, they are not "calling out" violations of the social order. They are the ones violating the social order themselves. The "Karens" are the ones with the wrong behavior because their sense of entitlement causes them to condemn other people's behavior, not because it is wrong, but because the "Karen" just doesn't like it.
I don't know you, but you've gotten it wrong. Perhaps you should pay more attention to how "Karens" behave, and under what circumstances.