From what I understand this cartoon explains what is going on quite nicely. It is not what she is saying (though I understand that it is hate-filled) that has caused severe problems, but rather the volume her voice is when she says it. She is literally drowning out the voices of the professors to the point they have cancelled some classes because the profs don't see the point of shouting over her. Have you ever attempted to study for a final without the class being taught? Or read a book while someone is shouting at you? She could be singing about unicorns and rainbows - it would still be a problem.
Whether or not Ms. Thurman personally receives a bonus at Christmas is irrelevant. Educators are required to have more education than a typical hair stylist. People with more education typically make more money. Most people working in Corporate America (who have educational requirements similar to teachers) receive an annual bonus as well as a raise or at least a cost of living increase. To expect our educators to put up with less than their peers is ridiculous. This is why so many people who would truly enjoy teaching do not choose that profession - they simply can't afford it.