The author mercifully left out the part about how not too much assymetrical warfare is needed to bring down a society as free as ours with as much populace concentrated in the big metro areas ... chaos brings hunger brings anarchy brings mayhem brings a democratic society to its knees, unable to project its vast miliatry might beyond its own riot-riddled shores.
The antidote, by thew way, is a well armed, organized, patrolling citizenry, involved in the peacekeeping of neighborhoods.
They sure as hell have found our 'Achilles Heel'! Americans have become too soft and half, judging by the electorate, are dumber than a box of rocks!