So you would have the United States tuck it's tail and abandon the rest of the world to evil men. Only a coward strikes at defenseless civilians. Those who conducted these strikes, anyone who justifies these strikes, anyone who advocates leaving the world to those who would do such things are evil. Good men everywhere have a responsibility to oppose evil regardless of where it occurs.
We have too many in this forum who would trade the responbility to oppose evil for personal comfort. And, I meant for personal comfort. No matter how much they try to disguise this as ideology, a desire for lower taxes, cheaper oil, or to avoid terrorist attacks - their motivation is their own personal comfort. This is reprehensible, evil, and worthy of condemnation.
Then our B-2 pilots who dropped bombs on defenseless civilians in Serbia were cowards. All the more so, since they didn't dare go below 24,000 feet for fear of being shot at, and so their bombs often landed wide of the mark and killed even more civilians.
The terrorists who flew into the World Trade Center towers may have been evil and insane, but they were not cowards.