That the massacres were “pure, unadulterated evil.” That there is “no excuse” for what Hamas did. That Israel has an affirmative “duty” to defend itself, not simply a passive “right.” That the United States will make good on its commitment to a Jewish state not with feeble statements of solidarity but with the surge of military force. A few days later, in an interview with “60 Minutes,” he called the assault “barbarism that is as consequential as the Holocaust.” We need political leaders who maintain the capacity to call out barbarism by name and who commit themselves to its defeat....