Wealthy donors and even officials in nations like Iran, Saudi Arabia and Pakistan have at times tolerated terrorist groups that attack religious foes in other nations. Inevitably, the extremists lash back, seeing to control the minds and hands that feed them. Such is the case with the self-proclaimed caliphate known as the Islamic State, also ISIS, ISIL or IS, which now controls extensive strands of territory in Syria and Iraq. In pursuing a strategic path through the two nations, terrorist leader Abu Bakr al-Baghdadi purports to lead all Muslims and extend the caliphate to other nations. The world, especially Muslim nations, must cooperate to cut the group’s financing used for weapons, operations and recruiting.