"we are currently using drones to kill anyone we see that is, or looks like, one of the terrorists on our list in Pakistan. How do you strike back at something that is completely untouchable?" - finally the US has gotten with the programme, the pentagon was kicking into gear by Robert Gates, (bush's last War secretary, and the one guy Obama kept on) Greatly increasing the production of things like drones. (cause it only costs 20,000 dollars to put one in the air, and they can be run 24/7.)
So the US are using every tool in their arsenal, why should you expect the enemy to do anything but the same. If that means attacking civilian targets, they will. If that means hitting militrary targets or embassies across the middle east, they will.
They are not evil, they have different values. You are blind if you can't see that.
They are people, not brainwashed, people with beliefs.
They believe their culture is important, that they are also of the opinion the US influence in the middle east is corrupting their culture, that the exploitation of their markets, the support of dictators to extract their oil on favourable terms, the influence on their markets with goods which they may see as degenerate or frivolous. They are fighting this influence in the only ways they can think of.
You call them evil while you send automated drones into their skies and rain fire on their villages from above. You, the US could be seen as an evil force in the world which must be combated at every turn. Anyone who subscribed to that point of view would do anything to stop you from further corruption of the people and culture of Islam.
Is there any wonder that uneducated villagers in the middle of nowhere celebrate when a US drone is brought down? They see a weapon which can only be used to kill them and they were happy.
Evil, well that's just a human concept. There is no absolute good/evil. You may have a different world view to these people, but if you can't understand their views then you have no chance of negotiating with them or resolving this conflict peacefully and fairly.
If they are so different to you then they probably wouldn't be able to understand your views either, but short of genocide you're not going to win this war, it will just become more bloody and extended. The US may pull out, and the Islamic nations will celebrate. Smart Islamic governments will try to avoid letting the US know that they are supporting terrorists. Others will end up the way the Taliban did in 2001 when the US removed them from Kabul.