Rage Against the Machine, Serj Tankian, Roger Waters, Run the Jewels and Patti Smith are among the 600 musicians who have signed an open letter asking fellow artists to boycott performing in Israel until there is a “free Palestine.”

The Musicians for Palestine letter was also signed by the Strokes’ Julian Casablancas, the Roots’ Black Thought and Questlove, Godspeed You! Black Emperor, Thurston Moore, Bun B, Royce Da 5’9″, Cypress Hill, Talib Kweli and hundreds more.