Key to the success of ISIS in Iraq is its alliance with Saddam Hussein’s former military officers who lost their jobs when the United States toppled Saddam and his Baathist government. The former Iraqi military officers provided ISIS with their strong knowledge of Iraq, essential contacts, organizational and intelligence-gathering skills, bomb-building expertise and capacity, and tactical military support.

These resources were evident in the fall of Ramadi in May, after more than a yearlong siege. This devastating failure was also due to the lack of engagement of the local Sunni population in fighting ISIS. This segment of the population perceives the Iraqi central government as insufficiently aligned with Sunni interests, and it is therefore reluctant to fight on the government’s behalf.

The Sources of ISIS’s Support

It’s one thing to acknowledge how the United States has inadvertently helped ISIS grow. It’s quite another to figure out how to decelerate and diminish the growth of ISIS.

In order to understand how to deal with grassroots and terroristic movements, like those that emerged in Iraq in 2005 or ISIS today, we need to understand that they have multiple layers of support. Each layer of support sustains and grows the movement. The core of the movement represents the core fighters — those who carry arms and bombs. The subsequent layers of support provide weapons, finance, storage, safe housing, needed supplies, and intelligence. The outermost layers represent those who provide support through ideology, acquiescence, silence, and indifference.

All sides in a conflict operate according to an overall moral framework that justifies their existence and operations, though each side might consider the frameworks adopted by the others to be flawed. Peaceful negotiations have also been part of a moral frame, as was the case eventually with the Irish Republican Army. However, the core fighters in ISIS are committed, vicious, and sadistic. Nothing short of strong self-defense to defeat them is likely to work.

Harvard professor Stephen Walt suggests that a policy of containment and patience will result in ISIS creating a limited state and eventually joining the rest of the civilized world. He argues that many other governments currently in power — such as those in the Americas, China, Russia, and Israel — were built on brutal and coercive means. Yet Walt does not consider any moral frame in the outcome of these nations. Should the world have waited for the Nazis to become civilized?

The people of the region opposing and ready to fight ISIS and their allies, including the United States, must demonstrate a clear and consistent moral basis in all of their acts. We cannot fight ISIS while routinely killing civilians in the process. We must peel back the layers of support for ISIS by engaging the local community to work with us out of their own beliefs — and not just solely for our payments. Each layer of support to ISIS requires the engagement of a different community.

In the long run, promoting sectarianism in Iraq by arming the Sunnis in the Anbar region will help strengthen ISIS, a sectarian Sunni group. Eventually many Sunnis will go back to their roots and support their own group against Iranian Shia and foreign infidels. Already an explosion of sectarianism mixed with a generous supply of weaponry has engulfed the whole region.

It might seem almost impossible to disentangle the United States from the corrupt and brutal regimes in Iraq and Syria while also using these same regimes to fight against ISIS. Yet this is necessary in the short term. In the long term, a policy that emphasizes partnerships with the people and organizations on the ground to promote a system of government built on freedom and democracy is truly the only way peace will be brought to the region. Those efforts can begin immediately.

Both Presidents George W. Bush and Barack Obama have attempted to navigate between these short- and long-term goals in the Middle East. But both presidents have quickly reverted to short-term policies of brute force. President Obama recently accepted an offer from Turkey to use a military base adjacent to Syria to enforce a safe zone. That will only give Turkey a free hand to bomb the Kurdish fighters in Iraq that have been longtime U.S. allies.

Such a deal challenges the moral basis of U.S. action against ISIS. Our immoral acts will always weaken our moral frame and undercut the values we profess. President Obama’s 2009 Cairo speech touting freedom and democracy was beautiful. Can we still act according to those ideals?

Steps to Diminish ISIS’s Influence

The first thing the United States should do is shore up those parts of the region where democracy has successfully taken root. Tunisia’s people have proven their commitment to build a free and democratic society. The West should provide Tunisia the resources to build their economy, provide medical and educational services, and strengthen their young democracy. There is nothing like a successful Arab democracy to diminish ISIS’s murderous ideology and its lure of false glory.

Second, the United States should stop the use of drones and acknowledge that it’s immoral to kill non-combatant civilians. The killing of civilians undercuts any moral frame we use against ISIS and helps ISIS gain more recruits.

Third, Iraq must become free of ISIS as soon as possible. Instead of putting boots on the ground, the United States must provide Iraqi and Kurdish forces with as much support as possible. Allowing Iraq to fall apart will only enforce the ISIS narrative that the West wants to “divide and conquer” of Arabs by any means.

Fourth, the United States should establish a stronger relationship with the Muslim community in America. Muslims in the United States are ready and willing to defend their country, and they should be treated with respect, not surveillance.

Finally, the West must work more closely with Iran in prioritizing the defeat of ISIS. Passage of the nuclear deal with Iran is the first step. Collaborating with Iran to resolve Syria’s conflict is also necessary, even though it will likely lead to a less-than-perfect solution.

ISIS and its horrific acts can derail U.S. efforts and relationships in the Middle East. We must act, and we should act. But at each step, we must address the layers of support for this terrifying movement as we keep our eyes on our moral frame and our long-term goals.