This week, the royal commission into antisemitism and the Bondi Beach terror attack began public hearings. The attack on a Jewish family event, which killed 15 innocent people and injured dozens more, is not only the worst act of terrorism in Australia's history, it is also the most filmed. Much of the footage exists because survivors and eyewitnesses made the decision — often at great personal risk — to document what was happening. Many have chosen to share these videos more widely for fear that if they don't, the horror will be buried or the public will turn away. Similar...