A massive response was NOT needed. Bush and his crowd of dummies were provoked into a stupid massive response. But hey, the dumb masses, the military-industrial complex and Israel waged the best and dumbest PR campagin in history and have so far succeeded. Time for a little pushback and measure responses to deal with losers hanging around caves. They spend thousands while we spend billions. We lose.
The military rolls with all the troops and that's just the way it goes. The Taliban in Afghanistan was totally overwhelmed by the US led NATO response to the terrorist attacks on the US. It is a tactical blunder not to overwhelm your opponent on the battle field. When you attack with insufficient force you run the risk of losing all your troops, and turning over much of your equipment to the enemy who then can use it against your next attack.