Since when is a professor *required* to side with any brown student against a white student, regardless of topic?
In any case, the situation would have been made far more ironic had the professor stepped in on that particular topic, because the white student could then immediately point to the professor’s proactive stance against her as proof that whites get oppressed too, and that there are many forms of oppression including ideological.
Almost exactly what I was going to say. What the professor said about not “defending” a minority student is nuts. Once you get to this level, really, graduate school, how can you complain about oppression. You have done more than the MAJORITY of white people in this country.