No, it doesn't seem that way to me.
> People at his work had nothing to say about police brutality against black people, so of course they were racist and supporting it.
No, I think he's saying that them having something to say about every news item imaginable except the one that resonated with him in that way (well, other than their dismissal of the protest) was alienating and distancing independent of what motivated it.
Instead, I was merely raising the question about how people who don't attend such activities are viewed at their workplace and if it might negatively affect their standing at work, because I've seen this with other activities.
> Over the last 5 years I’ve heard co-workers spew hateful words about immigrants, boast unabashedly about gentrifying neighborhoods, mockingly imitate people who speak different languages, reject candidates of color without evidence because of ‘fit.’
Not for lack of attending some discussion sessions.