President Barack Obama has been excoriated for declaring that “we don’t have a strategy yet” for effectively confronting the Islamic State group. In criticizing Obama for taking too much time, Rep. Mike Rogers, the Republican chairman of the House Intelligence Committee, told “Fox News Sunday” that “this ‘don’t-do-stupid-stuff’ policy isn’t working.”

That sounded odd — like we should just bomb somebody, even if it is stupid. If Obama did that, what would he be ignoring?

First, experience. After 9/11, that sort of “fire, ready, aim” approach led George W. Bush to order a ground war in Iraq without sufficient troops to control the country, without a true grasp of Iraq’s Shiite-Sunni sectarian dynamics and without any realization that, in destroying the Sunni Taliban regime in Afghanistan and the Sunni Baathist regime in Iraq, we were destroying both of Iran’s mortal enemies and thereby opening the way for a vast expansion of Iran’s regional influence. We were in a hurry to change things after 9/11, and when you’re in a hurry you ignore complexities that come back to haunt you later.

I have no doubt the vile video beheadings of two U.S. journalists by the Islamic State are meant to get us to overreact, and rush off again without a strategy.

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Second, the context. To defeat the Islamic State, you have to address the context out of which it emerged. And that is the three civil wars raging in the Arab world today: the civil war within Sunni Islam between radical jihadists and moderate mainstream Sunni Muslims and regimes; the civil war across the region between Sunnis funded by Saudi Arabia and Shiites funded by Iran; and the civil war between Sunni jihadists and all other minorities in the region: Yazidis, Turkmen, Kurds, Christians, Jews and Alawites.

When you intervene in a region with no center, you very quickly become a side.

The Islamic State emerged as an extreme expression of resentment by one side: Iraqi and Syrian Sunnis who felt cut out of power by the pro-Iranian Shiite regime in Baghdad and the pro-Iranian Alawite/Shiite regime in Damascus. That is why Obama insists that U.S. military intervention must be accompanied by Iraqis producing a national unity government — of mainstream Shiites, Sunnis and Kurds, so our use of force supports pluralism and power-sharing.

But power-sharing doesn’t come easy in a region where kinship and sectarian loyalties overwhelm any sense of shared citizenship. Without it, though, the dominant philosophy is either: “I am strong, why should I compromise?” or “I am weak, how can I compromise?” So any onslaught we make on the Islamic State, absent national unity governments, will have Shiites saying the former and Sunnis saying the latter.

This is a sectarian power struggle. Consider a New York Times article last week about how the Islamic State is actually being led by a combination of jihadists and disgruntled Sunni Iraqi Baathist army officers, shoved aside either by us or by Iraq’s Shiite-dominated governments. The article noted: “After the Islamic State stormed into Mosul, one (Shiite Iraqi) official recalled a startling phone call from a (Sunni) former major general in one of Saddam’s elite forces. The former general had appealed earlier to rejoin the Iraqi army, but had been refused. Now the general was fighting for Islamic State and threatened revenge. ‘We will reach you soon, and I will chop you into pieces,’ he said, according to the official, Bikhtiyar al-Qadi, of the commission that bars some former members of Saddam’s Baath Party from government posts.”

That is what we are dealing with here — multiple, venomous civil wars that are the breeding ground of the Islamic State cancer.

Third, our allies are not fully allies: While the Saudi, Qatari and Kuwaiti governments are pro-American, wealthy Sunni individuals, mosques and charities in these countries are sources of funds, and fighters, for the Islamic State.

As for Iran, if we defeat the Islamic State, it would be the third time since 2001 that we’ve defeated a key Sunni counterbalance to Iran — first the Taliban, then Saddam, now the Islamic State. Thatis a reason to do it in a way that does not distract us from the fact that Iran’s nuclear program also needs to be defused, otherwise it could undermine the whole global nonproliferation regime. Tricky.

I’m all-in on destroying the Islamic State. It is a sick, destabilizing movement. I support using U.S. air power and special forces to root it out, but only as part of a coalition, where everybody who has a stake in stability there pays their share and where mainstream Sunnis and Shiites take the lead by demonstrating that they hate the Islamic State more than they hate each other. Otherwise, we’ll end up in the middle of a godawful mess of duplicitous allies and sectarian passions, and nothing good we do will last.

Thomas L. Friedman is a regular columnist for The New York Times.