He spoke after dozens of delegates from multiple nations walked out of the UN General Assembly hall en masse as he took to the podium. As the Israeli leader spoke, unintelligible shouts echoed around the hall. The US delegation, which has backed Mr Netanyahu in his campaign against Hamas, stayed put. The few world powers in attendance, the US and the UK, did not send their most senior officials or even their UN ambassador to their section. Instead, it was filled out with more junior, low-level diplomats. “Antisemitism dies hard. In fact, it doesn’t die at all,” Mr Netanyahu said....