Ed Sheeran's tour of North and South America was plunged into chaos Tuesday when four of his supporting acts abruptly quit in solidarity with the rapper Macklemore, who was dropped for making pro-Palestinian comments onstage.

Hours after Sheeran posted on social media about Macklemore's ouster and attributed the decision to the tour's promoters, Irish acts Aaron Rowe and Beoga, the Danish band Lukas Graham, and Finneas posted on Instagram that they were leaving the tour.