We've been living with terrorism ever since the first human picked up a rock and threatened to murder anyone who refused to obey and pay tribute.
What's being called a "war on terrorism" is a turf war between rival terrorist gangs. Right now the North American and European gangs have the upper hand due to having larger domestic economies to plunder in order to fuel their aggression, but the Muslim terrorists make more efficient use of the resources they have so they've managed to avoid being wiped out so far.
Or so most believe.