Demagogue

A demagogue is a popular leader in a democracy who gains popularity by arousing the common people against elites. In most cases this is achieved through oratory expertise that whips up the passions of crowds, appealing to emotion by scapegoating out-groups, exaggerating dangers to stoke fears, lying for emotional effect, or other rhetoric that tends to drown out reasoned deliberation and encourage fanatical popularity. Demagogues overturn established norms of political conduct, or promise or threaten to do so.

Figure 1. Crowd triggering.

Demagoguery Techniques

Repetition

The general populace has a relatively low level of receptivity and intellect, but they have a tremendous capacity for forgetting. Because of these realities,  persuasive propaganda must stick to a small number of messages and repeat them in catchphrases until every last member of the audience has internalised the message.