"That is why it is impossible simply to stand by and not take sides. No outcome is assured by any deep logic of history or by any iron law of human development. Individual civilizations rise and fall; in each case the fall was not inevitable, but due to the decisions or lack of decision of the human beings whose ancestors had created the civilization for them, but who had forgotten the secret of how to preserve it for their own children."
That's one of the most telling insights of the preface. There is no neutral ground - morally, philosophically or otherwise. That's the gist of, "you're either with us, or wit hthe terrorists."