Mark Steyn: Pan-Islamism challenges idea of nation state - '...If you'd told an Englishwoman that all liquids would be banned except milk for newborn babies that could only be taken on board if the adult accompanying the child drinks from the bottle in front of a security guard, she'd have scoffed and said no one would ever put up with such a ludicrous imposition. But now it's here. What other changes will the Islamists have wrought in another five years? Absent a determination to throttle the ideology, we're about to witness the unraveling of the world.'