You have got to be kidding. If you claim students do not have to tell their teachers what the teachers want to hear, your credibility is in doubt.
You've got a be kidding.
I take it you have never attended a theological seminary or had to take a philosophy class.
Most theological colleges accept atheists. This doesn't mean they teach atheism, or that the atheist has to pretend to be Christian. They express and defend their beliefs and receive a grade based on their paper, not their belief.
Most (if not all) seminaries (grad school) requires the student to hold Christian beliefs (they provide a questionare that is to be answered honestly, and typically references). BUT they do not grade on acceptance or expression of the Seminary's position.