> it's the doctrine of jihad, stupid.

He means "a radical fundamentalist interpretation of the doctrine of jihad, stupid."

"Jihad" in Arabic means "struggle." Even in English, the word "struggle" can cover anything from an inner quest to World War III. "Kampf" in German can mean a personal "struggle" or it can mean "combat" or "battle."

Same with "jihad." Not quite the same, but consider the meanings of "crusade" in English. If I call for a "crusade against drug use," I'm not thinking about raising armies and only a lunatic would assume I was.

In modern Islam - the kind practiced, for example, by the Tsarnaevs' uncle who told CNN that the bombers "have no right to exist on this earth" - "jihad" simply means an inner struggle to become more spiritual. Incredibly, he even used the word that way in the CNN interview.

Unfortunately there are also dangerous fundamentalists who choose to interpret the word in the most violent way.

It all depends on who's using it and why.