Once she became a famous performer, Hart was always aware of which musical theater greats shared her lineage. "Everybody in the theater was Jewish," she declared matter-of-factly. "Except Cole Porter." She only gradually became aware of antisemitism around her. "I went to a dinner party – and in those days, everybody dressed up for dinner parties," she recalled. "And they were talking about the Jews in a way that was just awful. It was unbearable. And I got up in the middle of dinner, and I said, 'I am Jewish, and I won't sit here and listen to this kind of talk for another five minutes.' And I left. The bravest thing I ever did."