If you want to go to some level you can find a bit of it in everyone and not just white people and the idea that it only matters when the racist is white is highly disingenuous. Privilege does not just come from race. People like Cory Booker grew up with orders of magnitude more privilege than me,. He was raised in wealth and privilege that comes with it while I was raised by a single mother in the 50s and 60s when the gap was real.
I’ve spent plenty of time around black people and have experienced how they really feel a friends who are brothers from another mother, as a matter of racial hate (read violence) and when I blend in at the bid whist table and they forget that I’m white. My wife is a brown southeast Asian and my children appear racially ambiguous. We’ve lived in other countries, both their mother’s homeland and the middle east where they were sometimes mistaken for Arabs since they are Eurasian (a mixture of European and Asian stock). Interracial and cross cultural experience has been a part of my life for the last 50 years where relationships between all different races have been in my face. People of color aren’t all always the best of friends by the way. I only mention that to let you know that I don’t speak from ignorance.
My point remains, to paint the people of any race with such a broad brush is actually racist. Racism is manifest in low expectations of people of a given race based upon their race. A very common form of racism is the soft racism of the white allies who consider black people incapable and in need of them to come riding in on a white horse to save them. Another is Marley’s apparent low expectations of white people just because they are white.
I don’t write that with any venom. I read Marley’s articles because they are interesting, informative and I like her but I think she drew her circle too large to be useful in this article. As you wrote, nobody likes to be called a racist, especially when they have done more on an interpersonal (face to face) level to make things better than most.