By Fareed Zakaria
The death of Abu Bakr al-Baghdadi is a real victory in the war against terror groups. The Islamic State is one of the most cruel and dangerous organizations to have roamed the planet in a long time, and its leader’s death damages it badly. But as recent protests from Iraq to Lebanon have shown, the Middle East remains a troubled region. And if Baghdadi’s death produces a greater American disengagement from the Middle East, then things could spiral downward even faster.