ColorOfChange.org's take on the events.
Now read this:
Wiki's take on the events.
A few conjectures:
1. ColorOfChange.org's article is extremely biased. Many of its citations come from a truthout.org article which doesn't cite many of its sources.
2. wiki's article is less biased, if biased at all.
Consider that if ColorOfChange.org's description is closer to the truth, then our society is backward because of racism.
If wiki's take is closer to the truth, then our society is backward because of our tendency to associate motives which aren't there.
In any event, it seems to me that the six committed a crime and ought to be punished for it, regardless of who went unpunished for their crimes.