Oklahoma State was my school and I only occasionally had to deal with lib-profs during undergrad, usually on days I had to wear my Army ROTC uniform. OOTH, I had some great professors that taught straight down the middle and would engage in discussion from either side. A couple of the history professors were particularly good at this.
When I returned for graduate work in the 2000s, much had changed, along the lines you note your son is experiencing. Much more in-your-face libness but I gave back as good as I got...at least I believe I did, anyway.
OOTH - should be OTOH...FR edit function in the future, I hope.