Critical thinking has been supplanted by mere "contrarianism".    Critical thinking means the  logical analysis of ideas with the expectation that you may learn somehtign you may otherwise not  have.  Contrarianism simply rejects  ideas because of who the ideas come from and not because of the substance of the ideas. Being able to shout down a teacher and stop a class with violent shrieks of rage is not critical thinking, yet is championed as such.