WASHINGTON — In the course of one week, the burning of copies of the Koran by U.S. military personnel in Afghanistan has set off a deadly chain of events that has not only inflamed tensions but possibly exposed a crippling weakness in the American strategy to wind down the war.
The emerging U.S. strategy in Afghanistan is built around plans to replace large NATO combat formations with small teams of advisers who will live and work alongside their Afghan partners.
But the killing of two high-ranking NATO officers by an Afghan security official, and the subsequent decision by the top NATO commander in the country to recall his personnel from top Afghan ministries, has spurred doubts about whether Afghan security forces can be relied upon to provide for the protection of their Western partners. The consequences of that erosion of confidence, former U.S. officials and analysts say, could be devastating.
"If the trust, ability and willingness to partner falls apart, you are looking at the endgame here," said Mark Jacobson, who served until last summer as the NATO deputy senior civilian representative in Kabul.
The killing of the U.S. officers on Saturday occurred two days after a man wearing an Afghan army uniform fatally shot two American troops in eastern Afghanistan, the latest in a string of incidents in recent months in which local security forces have turned against NATO personnel.
Some of the killings have been perpetrated by Afghan troops whose loyalties lay with the Taliban. But, in most cases, the attacks have been the result of tensions between U.S. forces and Afghans who felt as though they had suffered an insult to themselves or their faith.
On Sunday, Afghan President Hamid Karzai, who initially responded to the Koran burnings with outrage, sought to stem the latest wave of violence by issuing a plea for calm and blessing the withdrawal of NATO advisers from his ministries as a justifiable measure.
But protests continued, including in the northern city of Kunduz, where Afghan demonstrators opened fire and tossed a grenade at a U.S. base, wounding seven American troops. The Afghan defense and interior ministers canceled a long-planned trip to Washington to focus on curbing the violence, which has claimed at least 25 Afghan lives, including two on Sunday.
"We remain committed to a partnership with the Afghan government and people," the U.S. ambassador to Kabul, Ryan Crocker, told CNN on Sunday, promising that American service members and civilians would continue to work with their Afghan allies.
For now, though, much of the cooperation between U.S. advisers and their Afghan partners is on hold. And even though the decision to withdraw the advisers is probably temporary, it is not clear how U.S. troops will be able to re-establish trust with Afghan security forces.
An Army officer who works as an adviser in Kabul told the Washington Post on Sunday that things won't return to business as usual. The threat to NATO forces is still higher than normal, said the officer, who requested anonymity because of the sensitivity of the subject.
Once advisers return to the ministries, the officer said, some will probably have to shorten their visits, instead of remaining there for six- to 10-hour shifts, to reduce risks.
Senior Obama administration officials have sought to reassure a war-weary American public that the NATO combat mission in Afghanistan would draw to a close by the middle of next year. These officials have implied that the change to an advisory mission would not only mean fewer U.S. service members in Afghanistan, but also less risk for the noncombat troops who remain behind.
Military experts, however, say that the smaller U.S. advisory force might be more exposed to fratricidal attacks than conventional military units. Such attacks, which were exceptionally rare in Iraq, often stem from a cultural chasm between U.S. and Afghan troops.
Carter Malkasian, who served as a State Department adviser in southern Afghanistan's Helmand province in 2010 and 2011, said one way to mitigate that risk is for advisers to build closer relationships with their Afghan partners. But the risk will always be there.
"The most effective advisers will be with their Afghans all the time, and that certainly does involve additional risk," Malkasian said.
Unlike a typical infantry platoon, which consists of more than 35 heavily armed soldiers, the advisers work in teams of as few as a dozen troops. Some military and civilian advisers working in Afghanistan said Sunday that they believed that they would soon be able to return to their work.
Current plans call for the U.S. force in Afghanistan to fall from a peak of 100,000 troops to about 68,000 by the end of the summer.