The dogma around racism has reached absurd conclusions today.
Until stereotypically the media keeps making racist narratives in its attempts for inclusivity. Look at Cleopatra currently. It's a racist movie. Any other production doing likewise would carry a racism label? A white person playing Nelson Mandela.
Why doesn't anybody talk about racism. Ethnic genocide. Instead of using it as a narrative where why can't there being a Black Cleopatra. Because it's racist. If every prejudice is racist? Or if it was supposed entitlement, and privilege? Pretty sure a Black Doctor Who is also racist.
So, who told you that only Whites are racist?
Anyone important? Did you just read it as opinion somewhere, on some rightwing outrageporn blog or did someone actually tell you personally?