We must be absolutely clear-eyed about the following two truths about Hamas. First, Hamas exists for one and only one reason: it is on an eternal, holy mission to destroy Israel by killing the Jews. Second, Hamas leaders believe that any and all Palestinian lives must be sacrificed in pursuit of Hamas’s mission. Hamas’s leaders have said—over and over—what they are and what they want. And they have shown us that their deeds match their words. Understanding Hamas—and its particular brand of antisemitism—is crucial, because it shows the international community the path to saving thousands of lives.