It is a given that many media and political descriptions of Benjamin Netanyahu’s speech to the United Nations will call it fiery and defiant. And so it was — and so it had to be. Both the content and the sometimes-harsh tone were essential if he was to capture the moment and the point of his appearance. Once again and always, Israel is in a fight for its existence, and finds itself being abandoned by former allies in Europe and increasingly isolated on the world stage. Given those circumstances, nobody of sane and fair mind could seriously expect the Jewish...