Rabble-Rouser(noun)
A person who speaks with the intention of inflaming the emotions of a crowd of people, typically for political reasons.
Hindi meaning:भीड़ उत्तेजक
Synonyms: Demagogue, Firebrand, Incendiary, Troublemaker, Inciter
Antonyms: Peacemaker, Reconciler, Negotiator, Pacifier
Example: He's simply a professional rabble-rouser who has nothing better to do with his time.
Trick to remember: Uske rabble-rouser se trouble hui mob ko 
