Am I racist when I am in a group of nearly all white folks and it bothers me then? I'm white, CIS, male, I've got bingo on everything but wealth, and that's just perspective I'm absurdly more well off than the vast majority of humanity. The answer is no. I'm not racist because I don't hate white people. I don't dislike them, what bothers me, and what I read Ceepolk as saying, is that I don't like the absence of diversity. It bothers me when a space is primarily male, or female, or white, or other. Case in point, this thread strikes me as overwhelmingly white and male. There may be some participants who are not, but the feeling of this culture is white, male and intellectual. Consequently it takes me a lot more effort to participate here than in forums where I perceive greater diversity.
RINCF posted problematically and Eowyn broke it down in detail. RINCF has admitted they should have posted their own thread. My guess is you feel that culture does not show through in posting and language use. Having spent time among a more diverse group, I can say it does and I've seen people react to it, apparently without realizing it. Scenerio was one, and you can see me calling him out on it if you go digging.