I am currently a high school senior and have not officially begun college yet, but I've taken four summer classes at a local university and my school is operated by another university. Some of our teachers are also professors at the university. We're permitted to audit any university course that is of interest to us, and I've taken advantage of that opportunity. I feel like I have a fair idea of how professors behave.
God's Not Dead felt as implausible as
Hot Tub Time Machine to me in many regards. Can you imagine the amount of ire both within the university community and the world at large if a professor actually behaved the way the one did in the movie?
Last year a TA who was leading an in-class conversation about philosopher John Rawls’ equal liberty principle rolled a snowball that led to an avalanche of hate falling down upon her when she rebuffed a student's desire to discuss gay marriage. She had sound reasons for doing so, but she was vilified, labeled as everything from a suppressor, to a witch, to the antichrist, to just a liberal (used as a pejorative), and people demanded that the university serve her head on a platter. In the movie the students were not taught the contents of the course they (or their parents) were paying for them to learn. The movie was based on an old urban myth, not real events.
My professors and teachers have all been very diplomatic, especially in regards to more sensitive and volatile topics. I'm currently in my third philosophy class and have audited two others. Religions have been extensively discussed, but with a productively respectful and unpatronizing tone. At times comments from the students have gone too far, but the professors have redirected them. Last year I took an Evolution, Ecology, and Environment course at UCLA that has a segment explaining why creationism is not a valid scientific alternative to evolution, but it was handled so considerately and delicately. It had a feather-touch to the Bible, mentioning it lightly, solely in relation to Genesis. There are dozens of creation myths, so it was not targeting the Bible's. Some could have perceived that as belittling or discrediting the Bible, but from the vibe of the class I am reasonably confident that no one actually did. I think we decide what offends us. Last quarter I audited an agnotology course that had a larger component on topics relating to Christianity, and the professor still had finesse. The course description and sample syllabus posted online provided an accurate explanation, and it was not a required course for any major. Students opted to take it and were at liberty to drop it.
I actually have felt that challenges to my faith have been whetstones for it, so as long as the professor wasn't a belligerent buffoon like the one in that movie I don't think I'd be that bothered if I did take a course where a professor more openly and forcefully confronted Christianity.