A political leader who tries to stir up people

One word substitute is Demagogue.

Demagogue: a political leader who seeks support by appealing to the desires and prejudices of ordinary people rather than by using rational argument.
Dictator: a ruler with total power over a country, typically one who has obtained control by force.
Statesman: a skilled, experienced, and respected political leader or figure.
Martinet: a person who demands complete obedience; a strict disciplinarian.