Colwell has taken the Abu Ghraib photos, which were already starting to lose some shock value through endless media repetition, and dared to nationalize them by making ugly, monstrous caricatures out of "the troops." We aren't supposed to regard our soldiers as bad or suspect, even though the war was launched for fraudulent reasons and no one knew how the "liberated" Iraqis were being treated. (For the record, I support the troops but wish they could be put to work by the Pentagon protecting us from our real enemies.) The people who assaulted Colwell's dealer are still in whipped up "war mode"--which is hard to come down from after all the Fox News and New York Times/Judith Miller propaganda. The dark side of America is an ugly beast and with blood in the air, it's not so easy to calm. When the Japanese attack you, you put all your energy into attacking the Japanese; when an "invisible network of terror cells" attacks you, it's hard to know where the energy's supposed to go. So you hit "sitting duck" countries. And art dealers.
Fortunately there's some counter-energy in the form of concerned artists who fear fascism at home more than randomly-striking terrorists. In this sense Guy Colwell is a sort of anti-Mumford, referring here to Steve Mumford's rapidly-dating "Parisian flaneur in Iraq" sketchbook drawings of American soldiers at work and rest in an exotic foreign land. Those bland, tastefully smeared, courtroom style drawings, purporting to be some kind of art vérité, managed to hide the hatefulness and essential wrongness of the US invasion of a country that never threatened us except with words--a classic colonial adventure fused with misdirected payback. Mumford even got interviewed by CNN, the official voice and supporter of the war. Colwell's art is simplistic, not tasteful in the least, but it cuts right to the subjugating core of the BushCo enterprise. Not that a punch in the face validates art or is anything other than repugnant, but no one will ever be punched over Mumford's drawings.
[UPDATE: Capobianco gallery's "Guy Colwell page," which had a clearer view of the Abu Ghraib painting, was removeda few hours after I posted this (that's the gallery where the dealer was attacked). Its website is now also closed, but has a phone number to view a video of the gallery closing memorial.]