No Salafi jihadist organization, not even ISIS, poses an existential threat to the United States.
Nor, in recent years, have Salafi jihadists posed the most direct terrorist threat to individual American citizens.
Indeed, white supremacists and far-right extremists have committed nearly twice as many terrorist murders in the United States as have jihadists in the years since the 9/11 attacks. But that narrow measure of the threat fails to capture the unique danger posed by Salafi jihadism: it is the only extremist ideology able to attract large numbers of committed fighters around the world, and it motivates ISIS, the only extremist organization able to threaten the stability of states and the regional order in the Middle East. In addition to the territory the group now controls in Iraq and Syria, its affiliates have established “provinces” in Egypt, Libya, and Yemen, among other places. ISIS is threatening many U.S. allies and inspiring or directing an unknown number of followers to act beyond the territory it controls. Its ultimate goal—a pipe dream, one hopes—is to destabilize and eventually take over Saudi Arabia, which would have profound consequences not only for the region but also for the world.