I'll answer your question: whiteness is exclusionary by definition.
You're not going to "allow" the comment to go "unnoticed and unchecked"? Please. What are you going to do? White-men-in-general are going to be talked about in a negative way. I welcome it. Hatred is warranted when it's hating the oppressors; it's called "punching up."
And it doesn't even matter if you scoff at that language, which is the great part, because people are quickly realizing that, for example, for all the celebrity surrounding the non-violent Nelson Mandela, he was ultimately a utilitarian when push came to shove...