I struggle to understand white people who sincerely seem to believe they are not racist, yet who jump into the mentions of People of Color to try to argue with them about the racism those people encounter on Mastodon. Why would you do that? Why do you think you're qualified to tell them what is and isn't racist? How do you expect the conversation to go? Why not boost those voices instead? Why not try to learn more (without nagging PoC for "proof")? What not ask, "What can I do to help?"