The population of Israel is about 10 million. This represents nearly half of the world’s Jewish people. The founding idea of modern Israel was to offer a sanctuary for Jews in their biblical home in the Middle East, in the aftermath of Nazi Germany’s mass murder of 6 million Jews. Yet, 78 years after the Holocaust, anti-Israel protesters throughout the Middle East, the great cities of the Western world and iconic American universities chant death threats and “Palestine will be free from the river to the sea.” Their signature slogan is shorthand for the erasure of the Jewish state and...