Cat and Griffith both put it very well.
Gizmo, if we were isonlationalist, you would be complaining the exact opposite thing right now. Before WWII, we were isolationist, and people like you complained. Now, we get involved, and people like you complain.
No matter what is going on, other people will be mad at the most powerful countries, saying that country is not doing the right thing. It seems to me that your ideal America does nothing other than fly planes over the UK dropping hundred-dollar bills out.
Frankly, considering its own people should be its main priority, the U.S. does a ton for other countries. People over here complain that we are doing too much.
The person behind this is not doing it because Americans are oppressing his people. He is not doing it to protect them from us. The fact that he so willingly sends them to die shows that his interest is in killing, not helping. He attacks us because the U.S. keeps him from killing many more people.
Frankly, the actions of the U.S. did bring this on us. But only because those actions prevent the killing of many other people.
We could pull into an isolationist policy, as you guys want. And either the Palestinians or the Israelis would be extinct as a race shortly after. More oppressive governments like the Taliban would be in power before long. Maybe France would be part of Iraq, with the British on their way to the same fate. And the U.S. suffers too, because we lose international trade and economic stimulation. In short, it sucks for everybody.
In truth, our choices are few, and most suck.
We could do what they want, pull out. Not only does the stuff I mentioned above happen, but terrorists see that we are weak and will give into their demands. Forty more planes are hijacked in the next week, by the group that wants the New York Yankees disbanded, the group that demands to know just how do they put all that Graham into Golden Grahams, the group that wants to institute Magic: the Gathering as a National religion, and the guy who's mad cause his goldfish died.
We could ignore it, act like we always did. Same things happen.
We could declare a World Peace Treaty. Everybody could smile, sign it, and declare "a new world of hope". The terrorists don't care, they see we won't do anything and the same stuff as above happens.
We could go bomb-crazy and blow up the country the guy is in. Tons of innocent people die, and we are seen as the bad guy.
We could go capture the guy, throw him in jail. Spend tons of money to keep him alive and in jail. Breakout attempts happen daily. The terrorists just get pissed. If their leader is still alive, they still have hope.
We could go in, capture him and his entire group, and bring them back here. We put him on trial. Then, the entire grout is killed. The world sees that we don't compromise our ideals, but they also see that they won't get away with attacking us. Maybe other groups get mad, and attack. But it's the outcome that appeals more to me than any other, because there's a chance of peace afterwards.