If "Never Again" means that the world will mobilize to stop mass atrocities -- genocide, torture, ethnic cleansing, war crimes, and crimes against humanity -- then the integration of an exhibit at the U.S. Holocaust Memorial Museum showing ongoing crimes in Syria that rise to that level belies our commitment to such a slogan.
I consider this ideology to be the greatest danger that the world will face in the next decade. Its seeds are growing in Europe, the United States, Asia, and elsewhere. With its twisted religious overtones, this pre-packaged franchise of hate is available for any terrorist group to adopt. It carries the power to mobilize thousands of desperate, vindictive, or angry young people and use them to strike at the foundations of civilization.
While the world's attention has been focused on the combined efforts of Arab and U.S. forces attacking the Islamic State positions in Iraq and Syria, there is unfolding in Lebanon, a third front in the war against this violent extremist group. The threat of IS poses an existential challenge that must not be ignored.