This is not a Jimmy Carter moment—a U.S. Embassy and its staff seized and held hostage for 444 days, America's enemies taking stock of its weakness, its allies running for cover. But the anti-American protests that broke upon 20 nations this past week must be reckoned a grand personal failure for Barack Obama, and a case of hubris undone.

No American president before this one had proclaimed such intimacy with a world that stretches from Morocco to Indonesia. From the start of his administration, Mr. Obama put forth his own biography as a bridge to those aggrieved nations. He would be a "different president," he promised, and the years he lived among Muslims would acquit him—and thus America itself. He was the un-Bush.

And so, in June 2009, Mr. Obama descended on Cairo. He had opposed the Iraq war, he had Muslim relatives, and he would offer Egyptians, and by extension other Arabs, the promise of a "new beginning." They told their history as a tale of victimization at the hands of outsiders, and he empathized with that narrative.

He spoke of "colonialism that denied rights and opportunities to many Muslims, and a Cold War in which Muslim-majority countries were too often treated as proxies without regard to their own aspirations."

Without knowing it, he had broken a time-honored maxim of that world: Never speak ill of your own people when in the company of strangers. There was too little recognition of the malignant trilogy—anti-Americanism, anti-Semitism and anti-modernism—that had poisoned the life of Egypt and much of the region.