Kneecap on stage in London last weekKneecap have accused the London Underground of “censorship” after revealing that an ad for their upcoming live show has been banned from appearing on the Tube.For the last few months, the West Belfast trio have claimed that they’ve been the victims of a “witch-hunt” and “smear campaign” ever since their set at the Coachella music festival in April, where they expressed solidarity with Palestine,  leading the crowd in chants of “free Palestine” and projecting messages like “fuck Isr