In an address to the International Association of Chiefs of Police conference in San Diego, California on Saturday, FBI Director Christopher Wray issued a dire warning about the rise of violent extremism, both domestic and international. The warning comes amid ongoing conflict between Israel and the militant group Hamas, which has already claimed thousands of lives, including 29 Americans. “Before I get into some of the specific ways we’re doing that work together, I want to take a moment to offer my heartfelt condolences to the people of Israel, and share the outrage that I know we all feel at...