People trained to discourage locals from taking a stand against weak invaders that never tell anyone in the city they invaded what they did to their city but still think they own the place, and to instead fall in line with their bullshit agenda/plan via violence to combat violence until the police show up to detain these locals.
Violence interrupters know they're there to provoke things further rather than to reduce anything, which is why they're not the funny kind of joke.
Fogey/fogy /fougi/ sl. (early 18C+, orig. Scot) old-fashioned, stuck-in-the mud.
Person with old fashioned ideas which he is unwilling to change: Come to the disco and stop being such an old fogey!
You think me an old fogeyand an old tory, his thoughtful voice said. I saw three generations since O’Connel’s time. I remember the famine. Do you know that the orange lodges agitated for repeal of the union twenty years before O’Connel did or before the prelates of your communion denounced him as a demagogue? You fenians forget some things. (James Joyce, Ulysses. PenguinBooks,1992. p. 38)