Daniel Barenboim
In 2001 he made many people in Israel angry because he conducted Wagner’s music at a concert there. Wagner was not allowed to be performed in Israel because he had been anti-Jewish. He changed the programme, but then decided to play some Wagner as an encore at the end of the concert. He spoke to the audience and said that anyone who did not want to hear the music could leave the hall. There was an argument for half an hour. In the end some people left, but most of them stayed and listened, and then applauded enthusiastically at the end.