Being insightful as I throw stones

Somehow I stumbled across this book The Enemy At Home: The Cultural Left and Its Responsibility for 9/11 on Amazon and it provoked two thoughts.

• First I thought of Eric Hoffer's adage, to wit, Americans can only hate Americans, they consider foreigners to be inferiors and feel sorry for them. That would make this book a sign of health, albeit an ugly one.
• Then I thought of the South Park episode "The Mystery of the Urinal Deuce" and the lines:

  Kyle: So who was responsible for 9-11?
  Stan: A bunch of pissed off Muslims. What are you, retarded!?