Me, writing on this site three years ago:

“[T]he situation in Iraq has got me thinking nervously about Amritsar and Londonderry. Crack combat troops with not much training in police methods, weary and frustrated, outnumbered among a sea of civilians… General goodwill from the mass of ordinary people towards the authorities in charge, but that goodwill only an inch deep, and ready to be turned to hatred by some outrage or error of judgment… Ruthless, cynical terrorists eager, eager to incite that outrage or exploit that error… The Londonderry gambit!”