The easiest reaction is to just pick a side. Either the 9/11 hijackers were normal, or they were insane. Ten years after that day, this false dichotomy continues to distort explanations of why the U.S. was attacked.
A decade of talking about who has won and who has lost is both immaterial and intellectually childish. It was never about winning or losing. It is about carrying on with life. Getting on with the business of this awkwardly, unevenly integrating world.