I do believe this to be true. From Victor Davis Hanson in the National Review.

If after four years of careful planning, al Qaedists hit the Olympics in August, the terrorists know better than we do that most Europeans will do nothing — but quickly point to the U.S. and scream “Iraq!” And they know that the upscale crowds in Athens are far more likely to boo a democratic America than they are a fascist Syria or theocratic Iran. Just watch.