Scott L. Malcomson is the author of Generation's End: A Personal Memoir of American Power After 9/11. He previously worked as senior adviser to the late Sergio Vieira de Mello, formerly UN High Commissioner for Human Rights.

It's not surprising that nine years after the 9/11 attacks, there’s a surge of anti-Muslim sentiment. What's strange is that it took so long to come to a head. Plus, our complete coverage of the anniversary .