Yeah so lazy. I'm sure it's the communists, those rabble rousers. Back to their old early 20th century tricks. Or probably italian immigrants, they are well known for staging terrorist attacks and massive hostage/executions, not to mention the suicide bombers, that's just classic italian right there. Maybe it's a german extremist holding a grudge from the first world war. Or an israeli as payback for Vichy actions. Or maybe christian fundies incensed at the hedonism and libertine lifestyle of alcohol and music and concerts and food. Yes, those are all as plausible as muslim extremists being responsable.