There’s this problematic thing in movies. It’s called the IRA antihero. Blame James Mason. He started it in 1947, playing Johnny McQueen, a doomed smoothie and Irish nationalist on the run, in Carol Reed’s Odd Man Out. He was followed by Robert Mitchum’s republican beefcake in A Terrible Beauty (1960), Stephen Rea’s wan philosophising Provo in The Crying Game (1992), and all manner of Hollywood A-listers, from Brad Pitt (The Devil’s Own) to Richard Gere (The Jackal), who seemed to stare into the politics of terrorism and see only the archetypes of heroism.