I think the commuters survived.

And I'm sure there's hard data that shows your assertion is valid, and that it's not just a general feeling you have that it's true?

Incidentally, as a general truth, major changes in institutional policy regarding race (or bigotry issues in general) have only come with disruption. The civil rights era of MLK was not just a bunch of people protesting quietly on a sidewalk, the abolition of slavery came with a war. So the idea that you seem to be presenting is based on some incorrect pretenses regarding being nondisruptive.

But in any case, my point wasn't "We should be actively seeking to disrupt traffic", but "Disruption to a commute due to a protest of yet another homicidal attack from police is absolutely acceptable, and trying to frame things as 'Don't do anything disruptive as a show of honor to this young man' is disgusting and self serving."

That's a ridiculous response.

The problem is systemic,it needs to be resolved by entirely overhauling the systems in place.

There's a video, it can be seen rather definitively.

In the long term? Drastically reducing the responsibilities of police officers, abolishing the police unions, making them wear body cams where the footage is publicly available with a presumption of guilt if they are not being used properly, an end to qualified immunity, screening of racial bias, and demilitarization of the police.

In the short term? Making it so that every time the police hurt someone, everyone feels the shock and disruptions from it. This has been going on since the inception of the police and it's time for it to stop, and that means being more vocal and louder each time it happens.

I thoroughly hate the implication here. It amounts to "Don't disrupt peoples' lives in honor of this young man." He died after a vicious brutal beating. A little traffic disruption for an evening is nothing in comparison to that.

I'd agree with your last point if it weren't for the fact that police are trained to be militant in the first place. 'Better training' could very well have meant 'being sure to not get caught'. The idea that police training would have been a good solution here is a bad premise from the outset. The fact that David Grossman still gives talks and is popular speaks volumes to the issue. The police are a brutal military force and, the vast majority of their jobs need to be replaced with social workers who understand mental health and harm reduction issues.