WordNet sense 1 (arousing to action or rebellion):

incendiary, inflammatory, rabble-rousing, incitive, instigative

WordNet sense 2 (serving or tending to provoke, excite, or stimulate; stimulating discussion or exciting controversy):

provocative

WordNet sense 3 (in opposition to a civil authority or government):

insurgent, subversive

WordNet sense 4 (deserting your allegiance or duty to leader or cause or principle):

disloyal