extremists
ɪkˈstriːmɪst
ɛkˈstriːmɪst
noun
a person who holds extreme political or religious views, especially one who advocates illegal, violent, or other extreme action.
political extremists
fanatic,radical,zealot,fundamentalist,hardliner,dogmatist,bigot,diehard,militant,activist,sectarian,chauvinist,partisan,ultra,maniac,crank