One can and should be angry about both. I wouldn’t go so far as to call the person who posted this a racist, but it’s still not a good practice. Taking an example of a stupid thing someone did and directing the criticism at their race isn’t OK for good reason. (Yes, saying “a white male did ____” is directing the criticism at the group, not the individual.) It encourages people to form judgments about white males as opposed to assholes who belittle others, which is who she’s really having trouble with.

The same thing being done to minorities and women is a much bigger problem, but using the same attack in the opposite direction isn’t exactly a good solution.