I guess I could link you to the "Causation does not mean correlation" wiki page. And, while we're at it, to Occam's Razor, too.
You think there's a lot of sexism in the chess community, therefore when a man accuses a woman of cheating it's because of sexism. Occam's Razor says that he thinks that person is cheating.
Similarly I should link him to it, too. He observes Rudolf playing very good chess. Therefore he assumes there must be Rybka in her lip balm lol.
Occam's Razor says, she's playing good chess.