Why aren't they blocking the border to Syria? Easy. They want excuses to demonize Syria, so that they can eventually find a pretext to attack Syria. They seem to be presently a bit more interested in attacking Iran, though...if I were a betting man I would bet on Iran being the next target of convenience for "regime change", the next so-called "greatest thread to peace in the world". This will be said cynically by the people who are themselves the greatest threat to peace in the World that could possibly be imagined at this juncture in history...the people who own the mainstream media in America lock, stock and barrel and can easily manipulate a TV-lobotomized public in pretty well any way they desire, by selling FEAR and blaming it all on some poverty-stricken foreigners who have the very bad luck to be living on a strategically valuable piece of real estate.