Agitator(noun)
A person who tries to persuade people to take part in political protest.
Hindi meaning:आंदोलनकर्ता
Synonyms: Instigator, Rebel, Troublemaker
Antonyms: Modern, Peacemaker, Uniter
Example: A political agitator, the angry young man, screamed in the faces of the protestors seeking change with local laws.
Trick to remember: Attend krte time agitate kro 
