Skip trying to prove you're not racist|
Well, my post wasn't about you either: I don't think you're posting on this topic to prove how non-racist you are, so if it came off that way that was unintentional.
I do think that it would be kind of presumptuous for a white guy like myself to jump into the middle of a discussion of racism and think I've got anything to contribute. And I don't feel I need to make posts saying "fans of color, I see you" because in my view that's kind of presumptuous too. Why would I assume they care whether I see them? I'm not more important than they are; we're all fans.
Your situation is a bit different, because you're in the industry and you post about fandom all the time. I can see why you'd feel it's appropriate in your case.