Noun
a secret agent who incites suspected persons to commit illegal acts
Source: WordNetSomeone who doesn't agree with you – provocateur. Graham Phillips (journalist)
Arthur was arrested in 1882, to be put on trial as a British agent provocateur stirring up further insurrection. Source: Internet
“And he’s a provocateur, he likes to make pronouncements like that. Source: Internet
Holland/Hart-Davis (2000:683) In reflective mode, Wilde coldly examines his career to date, how he had been a colourful agent provocateur in Victorian society, his art, like his paradoxes, seeking to subvert as well as sparkle. Source: Internet
But at heart, Stapleton is not a provocateur. Source: Internet
Critic, provocateur, daring dreamer, he deserves a prominence even higher than what the field has already accorded him. Source: Internet