The barbaric acts of the radical Muslims must be stopped. Militarily they can not be allowed to go on. But part of the long-term puzzle is a worldwide alliance of all major non-Muslim nations. The Sage of Singapore recommended that approach. This alliance would back the moderate Muslims. But another piece of the puzzle is the reform of Islam. The barbarianism must be removed as it does not come from God or Allah.
Now is the time for a Muslim reformation. The world is too small to allow another genocide, such as those conducted by Hitler, Stalin, Mao, and others, to spread. We must move to nonviolence and eventually worldwide peace.