“An exhibition inspired by the radical leftist Red Army Faction, loathed by many for its violent attacks in the 1970’s and 80’s yet lionized by some, opens Saturday amid angry debate over the romanticization of terrorism. Critics accuse the organizers of glorifying the guerrilla group’s campaign of bomb attacks, kidnappings and assassinations, which left more than 30 people dead. Curators and artists, however, defend the show as a subtle exploration of the ways images can traumatize a society.”