MOVING TO FRONT FROM NOVEMBER 17--UPDATED
The teacher was clearly well within her pedagogical rights, while the university's response was disgraceful. (That Jordan Peterson is, in some ways, a nut is irrelevant to the use of Peterson's work made by the teacher here, which was wholly appropriate.)
UPDATE: You can listen to an audio of the conversation between the TA and administrators. The administrators don't come off too well, to put it mildly.