It began with two words spoken into a microphone at MetLife Stadium in New Jersey on 4 September: "Free Palestine." Macklemore, the Grammy-winning rapper, told the crowd that the people of Gaza and the occupied West Bank had not been forgotten — a remark that lasted perhaps two minutes but set off a chain of consequences that has now unravelled Ed Sheeran's Loop tour from the inside out. Within days, the Israeli American Council had circulated a petition demanding Macklemore's removal, and at least one venue owner, billionaire NFL magnate Robert Kraft, had applied pressure that Sheeran acknowledged in a lengthy Instagram statement. Macklemore was out.

What followed was a solidarity cascade that few in the music industry had anticipated. By Tuesday, all four remaining support acts had withdrawn from the tour. Finneas, Billie Eilish's brother and a celebrated producer-performer in his own right, announced he would not take his six scheduled South American dates in November. Irish singer Aaron Rowe, who had been set to open the ten final North American shows, framed his decision in terms that drew explicitly on Irish historical memory, invoking forced famine and violent occupation as frames through which he read the conflict in Gaza.

Traditional Irish ensemble Beoga, who serve as Sheeran's backing band, announced they too would depart the American leg of the tour. The withdrawals have recast what was, until recently, one of the most commercially successful touring productions in the world into a referendum on the limits of artistic freedom. Rowe put the question with particular directness, writing that he would "lose all respect" for himself by continuing as normal while billionaires used financial power to silence dissent.