This happens equally on both ends of the political spectrum, and I would not entwine "coordinate" and "celebrate" so closely. If you have any real exposure to these communities you recognize any "celebration" as a performative stunt by losers (for lack of a better term) who have few other outlets for asserting self-worth. I've never witnessed a crime being publicly coordinated online.
> Being white has nothing to do with being a white supremacist. There are lots of non-white white-supremacists in the world.
Do you take it all these people are uncommonly virtuous martyrs? Authentic mental handicaps totally lacking self-awareness and logical consistency? I'm genuinely curious what you think the story is here, because I've always found this observation interesting.