The daily media coverage of the ongoing conflict in the Middle East makes it seem as though Israel is perpetually “escalating” — carrying on a ceaseless assault on Gaza, bombing Lebanon, and threatening Iran. It is Israel that is portrayed as the primary destabilizing force in the region, in need of restraining. But the anniversary of October 7 is an important reminder of why Israel fights. One year ago today, under the cover of rocket fire, thousands of Hamas terrorists invaded...