The idea that a war can be won by standing on the defensive and waiting for the enemy to attack is a dangerous fallacy, which owes its inception to the desire to evade the price of victory.
In responding to a terrorist attack, there are only two choices - take the fight to the enemy or wait until they hit you again. In my estimation, America chose the first.
It is easy enough to be friendly to one's friends. But to befriend the one who regards himself as your enemy is the quintessence of true religion. The other is mere business.