The slaughter at the Bataclan is unprecedented. There have, of course, been violent incidents at concerts, from the murderous Hell's Angels attack at the Rolling Stones Altamont free festival in 1969 to rioting by Metallica and Guns N' Roses fans in Montreal in 1992. But this targeted killings of fans is different. The Eagles of Death Metal, who were on stage when the murderers struck on Friday night, play the kind of raucous, melodic, uplifting music that makes you want to shake your body and sing at the top of your voice. Their name is gently self-mocking. No wonder Isis (Islamic State) hate such performers - the ability to laugh at oneself is beyond them.
Is this the clash of civilisations reduced to the petty meanness of particularly violent party poopers, determined that if they can't have a good time, no one else will? Some Muslim fundamentalists seem to loathe culture in general and music in particular. The use of music is, at best, a grey area in Koranic law, with reductive interpretations claiming that music should only be made to worship Allah; others forbid music altogether.
Under the Taliban rule of Afghanistan it was a crime to possess a radio. When Sharia was imposed on parts of Northern Mali in 2012 during the civil war, musical expression was outlawed, punishable by death. Militants destroyed recording studios, dismantled radio stations and amputated the limbs of people caught playing instruments. This is a vision Isis would impose on the rest of us: a world without melody. It is how a bunch of mad zealots can convince themselves that unarmed kids listening to a favourite band are legitimate military targets.
This is not our way. Music is the very rhythm of western life. The Bataclan massacre was, as the U2 singer Bono put it, a "direct hit on music".
It is the nature of terrorism to hit where it hurts. So if bands shy away from touring Europe, if audiences grow fearful of gathering to watch them, we will all suffer. This is when we need musicians to sing up and be counted.