It is quite probable that until that moment the doctor adhered to liberal views. But it happened so that he just started uttering radical slogans, which the crowd wanted to hear from him. Thus, participants of the meeting and the speaker inspired each other in strict accordance with the laws of psychology of the masses deduced by G.Le Bon, G.Tarde, S.Freud, S.Moscovici and other authoritative social psychologists. Philistines present themselves a great material for fanatic crowds. The equality of moral and intellectual standards makes it easy for philistines to find a common language and unite.
Crowds are nothing new.
There always were crowds but the time of their domination came in the end of the 19th and 20th century when the living conditions of philistines were unified by mass production and consumption. It terminated in the century of the masses. As for liberal democracy, it started dying in the end of the century. It was a reaction to uncontrollable growth of the society and impossibility of creating enough space for it. Something strange has been happening lately with philistines everywhere, from prosperous Switzerland to unstable Russia.