shit happens
You consider the murder of innocent people "shit" ? As if bombing people from unmanned aircraft and "accidentally" killing innocent people is acceptable in any way?
The problem is that the alternative to drones is a land invasion and slaughter of the "guilty." Even assuming the "guilty" (using scare quotes as the war on terror is mostly bullshit) are killed, a few 10s of 1000s of innocents would die as the marines fought their way there.
Or you guys could just stop invading other countries and mind your own business.. no offense
9/11 happened. Until there is no chance of it happening again, its fair to say that countries that harbour suspects will be seeing military action of some kind.
So, response to these military actions is clearly killing as many enemy combatants(that is anyone on USA soil) by those who are ready to sacrifice themselves for common good(that is their society's good). It works in both ways.
Very few in your government are ready for real solutions. That is working towards situation where neither side wants to kill enemy combatants... Which is either peace or killing all of the opposition. Later hasn't ever worked out well...
Revenge runs very deep in humans. Maybe someday we will overcome that. Not that there won't be outliers in every society, but that is just early prevention and care...