Until this week, the punk-rap duo Bob Vylan were largely unknown by mainstream audiences, despite having a UK top 20 album and an award from British rock magazine Kerrang! for album of the year. Now they’ve made headlines around the world after frontman Bobby Vylan led a crowd at Glastonbury in chants of “death, death to the IDF”. The chant was met with widespread condemnation in the UK. Glastonbury festival said the remarks “crossed a line” and characterized the chant, which targeted the Israel Defense Forces, as antisemitic. Keir Starmer, the prime minister, said the chant was “appalling” and said...