The cops should always strive to be better. That I agree with. And your last sentence is spot on.Have you ever seen the series "What Would You Do"? I have only seen a couple episodes but one reminds me of this.
The producers hired two groups of young actors. One group was White, one Black. Both went through a park "vandalizing" things. I quote vandalize because the items were placed there by the producers to be vandalized so no real vandalization took place.
The group of Black kids had the police called on them by several citizens. The group of White kids elicited one phone call.
But what really made the episode was this. A couple members of the family of one of the Black kids slept in their car at the other end of the park while the kid carried out his job. Two people called the police on them. So Blacks sleeping in a car received more 911 calls than White kids vandalizing a car.
Here is the episode
The police arrived in the OP case and immediately drew guns on the Black kids. Now there was one 911 call that said they were to blame. The problem might be the one caller, the problem might be the police, but there is a problem.
But the type of speculation going on in the original post isn’t helping anyone. Based on what we know right now, there is zero evidence that racism had anything to do with this incident.