“The obsession with radical Islam misses a more meaningful analogy for the current state of siege in the Middle East and Afghanistan: the helicopters hovering above the roof of the American Embassy in Saigon in 1975 as North Vietnamese tanks rolled into the city.

That hasty departure ended America’s long and costly involvement in Indochina, which, like the Middle East today, the United States had inherited from defunct European empires.

Southeast Asia had no natural resources to tempt the United States and no ally like Israel to defend. But it appeared to be at the front line of the worldwide battle against Communism, and American policy makers had unsuccessfully tried both proxy despots and military firepower to make the locals advance their strategic interests.

The violent protests provoked by the film “Innocence of Muslims” will soon subside, and American embassies will return to normal business. But the symbolic import of the violence, which included a Taliban assault on one of the most highly secured American bases in Afghanistan, is unmistakable.

The drama of waning American power is being re-enacted in the Middle East and South Asia after two futile wars and the collapse or weakening of pro-American regimes.

In Afghanistan, local soldiers and policemen have killed their Western trainers, and demonstrations have erupted there and also in Pakistan against American drone strikes and reported desecration of the Koran.

This surge in historically rooted hatred and distrust of powerful Western invaders, meddler and remote controllers has come yet again as a shock to many American policy makers and commentators, who have promptly retreated into a lazy “they hate our freedoms” narrative.

It is as though the United States, lulled by such ideological foils as Nazism and Communism into an exalted notion of its moral power and mission, missed the central event of the 20th century: the steady, and often violent, political awakening of people who had been exposed for decades to the sharp edges of Western power.

This strange oversight explains why American policy makers kept missing their chances for peaceful post-imperial settlements in Asia.

As early as 1919, Ho Chi Minh, dressed in a morning suit and armed with quotations from the Declaration of Independence, had tried to petition President Woodrow Wilson for an end to French rule over Indochina. Minh did not get anywhere with Wilson.

Indian, Egyptian, Iranian, Palestinian,  Syrian, and Turkish nationalists hoping for the liberal internationalist president Wilson to promulgate a new “morality” in global affairs were similarly disappointed.

None of these anti-imperialists would have bothered if they had known that Wilson, a Southerner fond of jokes about “darkies,” believed in maintaining “white civilization and its domination over the world.” Franklin D. Roosevelt was only slightly more conciliatory when, in 1940, he proposed to mollify the dispossessed Palestinian Arabs with a “little baksheesh.”

Roosevelt changed his mind after meeting the Saudi leader Ibn Saud and learning of oil’s importance to the postwar American economy. But the cold war, and America’s obsession with the chimera of monolithic Communism, again obscured the unstoppable momentum of decolonization, which was fueled by an intense desire among humiliated people for equality and dignity in a world controlled by a small minority of white men.

Ho Chi Minh’s post-World War II appeals for assistance to another American president — Harry S. Truman — again went unanswered; and Ho, who had worked with American intelligence agents during the war, was ostracized as a dangerous Communist. But many people in Asia saw that it was only a matter of time before the Vietnamese ended foreign domination of their country.

For the world had entered a new “revolutionary age,” as the American critic Irving Howe wrote in 1954, in which the intense longing for change among millions of politicized people in Asia was the dominant force. Howe warned: “Whoever gains control of them, whether in legitimate or distorted forms, will triumph.”

This mass longing for political transformation was repressed longer by cold war despotism in the Arab world; it has now exploded, profoundly damaging America’s ability to dictate events there.