I think the concept is of “critical thinking” which is to confront the ideologue.
Unfortunately when ideologues are in a position of power they attempt to use that power to simply shut up the free thinker, and shut down the discussion. At that point we enter dark times, “force on man” as Ayn Rand would say.
I think it would be fun to enroll in their classes for the express purpose of asking questions to rattle their cages (and maybe get some of the younger students thinking critically). If you aren't there for the degree, they have no power over you except to flunk you--and who cares!
Boy, that would frost their little cookies (and maybe awaken some of their students).
The liberal education establishment will not go away by itself. It is time to go on the offensive.