Taking it to the extremes and the bible, many things that even god does could be considered evil. Now if jesus was gods son, isn't it evil to let your son suffer the way he did?? Yet he was able to save Noah and many others according to the text. But then again it depends on how you look it. A christian might say, "he let him die because it was meant to be and he wanted him to come home." An Athesist might say, "well I would never let my son die that way without doing anything." It all depends on how you look at things and what your beliefs are.
Now without confusion, I believe that terrorists are evil and they should be punished severely for what they have done. That's my belief and yeah it's out of anger. Would I be doing good by doing such a thing?? I don't think so. That's the trap the world is in right now, a struggle of those with different beliefs on good and evil. Which is a trick cause it's all evil. Until we find a way to fight it without enforcing more evil...
"My whole life is a dark room...ONE BIG DARK ROOM" - a.f.i.