Any human being, in any sphere of activity, who wants to establish a farce, a lie, or an impossible goal, must do so by means of negation. This negation amounts to the evasion of the nature of existence and the misidentification of the facts of reality.
In the case of Marxist professors, negation is engaged by the practice of what is called "critical theory".
One of the fathers of critical theory was Herbert Marcuse who escaped European dictatorship by coming to America. America gave him the freedom and protection he needed to destroy capitalism in America.