What Australia witnessed at Bondi Beach in Sydney on Sunday was horrific beyond words. What should have been a peaceful community gathering to mark the first night of Hannukah turned into a scene of terror, bloodshed, and grief. More than a thousand people had assembled to celebrate light and hope. Instead, at least 15 innocent people were killed and many others injured when a father-son duo, heavily armed and dressed in black, opened fire on the crowd. Australian authorities have rightly described the massacre as a terrorist attack. One of the attackers was shot dead by the police; the other,...