Professor isn’t a racist, she’s just never wrong. A student had the audacity to question her and the professor became unhinged. Colleges are often little ivy covered North Koreas and professors are the infallible dear leaders.
No one, but no one, may ever accuse a professor of being wrong.
Things have sure changed since the mid seventies when I was in college. My professors actually encouraged debate!
This is probably the best assessment of the situation.