One might say that the Nazis were suffering from a paranoid psychosis. However, when many people in a society share and embrace a particular delusion, we no longer call this psychosis.

In the United States today, we are living within a psychotic delusion. But people hesitate to say this.

Psychiatrists do not argue with patients who have psychotic delusions. Yet the center of American society today consists of people arguing and debating with psychotic delusions.

We have not yet developed a way of conceptualizing psychotic ideas that are shared by many members of a society.

We don't have a clue how to "treat" shared psychotic delusion.