You’re right, I didn’t specify the Arts. My oversight. I made the mistake of thinking that you would have followed the long exchange I had recently with Herman Mays on this subject, and would have known that I had the Arts in mind. So I rephrase:
In the Arts departments, conservative religious views are not treated with anywhere near the respect that more liberal religious views, and non-religious views, are treated.
In subjects such as Business, Engineering, Economics, and many of the natural sciences, students can hold to conservative religious views, but those views are essentially private, as far as the course material is concerned. The professor neither knows nor cares what religious views the student has, and the material taught does not either affirm or negate those views. The religious views aren’t persecuted; they fly under the radar, so to speak.
In some of the natural sciences, such as Biology and Geology, in some cases there can be a clash between the views of conservative religious students and the views taught by the professor.
So in sum, in the modern secular university, conservative religious students frequently in the Arts, and sometimes in the sciences, experience a hostile atmosphere to their religious views. In other subjects, whatever hostile reactions they might get from profs for their personal views do not arise, because those views are part of their private and personal lives which the professor never sees. The message to conservative religious students is: If your religious views are conservative, keep your personal religious views out of the classroom, out of your essays, etc., as far as you possibly can. The religious liberal and the religious unbeliever do not feel this restriction.
Confirming my own independent observation, Nancy Pearcey has pointed out that conservative Christian students often choose to major in Business, Economics, Engineering, Phys Ed, Music Performance, etc., because in those subjects they are learning objective techniques, not discussing values or ultimate questions about God, the soul, ethics, the origin of the world, etc. They are much less comfortable in the natural sciences that touch on origins and in the Arts subjects, where their religious commitments are far more likely to surface, and so there is a tendency of them not to major in those subjects, unless they absolutely have to, e.g., if they need some biology to get into medical school. 100 years ago, even 60 years ago, such avoidance tactics were much less necessary, at least in the Arts classes, since the atmosphere in those classes was much more friendly, or rather, much less hostile, to traditional religious belief.