Horwitz acknowledged that “a few” of the best performers might not deserve an F. But the school wouldn’t let him teach just those students, so he had no choice but to flunk everyone and leave the course, he said. Wow—as a teacher myself, I went to this story all prepared to root for this guy, but can't. "[T]he school wouldn't let him teach just those students, so he had no choice but to flunk everyone"? Who knows wha…
I am not sure that it really is a teacher, let alone professor's professional responsibility to have to deal with the student's lack of basic human decency. I don't know what happened in that class and I also don't know if his statement about "a few" not deserving being flunked is accurate, but it does not change the fact of the matter that a teacher / professor / lecturer's only job is to teach and educate. Their jo…
It is every professional's responsibility to deal professionally even with unprofessional behaviour. That doesn't mean tolerating or excusing the behaviour.
For example, as a teacher, if I am repeatedly provoked and harrassed by students (which has never happened!), then I am within my rights to ask them to stop, to call security, and even to refuse to return to the classroom until some assurance is made that it is a safe environment. That is a professional response to unprofessional behaviour.
What I am not entitled to do is to say that there are some good apples, but, because of the few (or many) bad apples, I am going to fail everyone. That is an unprofessional response.