You still seem to totally miss the point. Possibly France bases its methods on whatever experience it has with terrorism (don't forget the colons of the Algerian war, the ones who wanted to assassinate De Gaulle).

But ETA, the Algerians, etc are NOT the concern of the the American government. And the American legal environment isn't their concern either. So why shouldn't they base their screenings on their perceived terrorism threat and laws, not OUR terrorism threat and laws?

Did you read that? Do you have an answer? Can you stop yourself from wandering off on some other tangent?