All this stems from a collective neurosis. Unfortunately it seems to be getting worse.
The success of the grievance peddlers most certainly is dependent on the compulsion that drives collectivist egalitarianism, and the demand for uniformity of thought & condition. Thus while the focus on imaginary grievances is the demagogue's technique, the egalitarian compulsion draws Lenin's "useful idiots," to the picnic.
Which group best explains this "teacher," is an interesting question.