> I think I'd actually feel a lot better about things if I were witnessing an argument about fringe political beliefs coming to the fore, rather than finding out how many people I know are overtly or covertly racist.
That makes sense, but it's also sensible to ask whether hijacking a much-needed conversation about race and police brutality to push fringe, Marxist-inspired political views helps people and institutions become less racist. It's not even clear that 'Black Lives Matter', as an overtly organized and led social movement, is doing all that much to meaningfully improve Black lives.
The parent poster described himself in another comment as pro-BLM (his phrase), and I think he was making some slightly more subtle points.