Of course it is not! They can't see that the only thing that terrorism gets is hate, fear and chaos.
In my opinion terrorism is the worst way of manipulation. Some organizations may even rule like a lobby, but there's no point on achieveing power by the force. We live in a democracy, and although we still have a long walk before we reach an equal society based on respect, honesty and truth, we must try to keep it improving. Terrorism is nothing but a stone on the road to freedom and we must wash it away.
How? You may ask. It's not going to be easy. I haven't said it is something we can fight within a few days. Even though, we must stand against it and try to erradicate it: together we can do anything. Together... And with some help of our governments, who must ignore any pressure they might recieve from terrorists, and also be truthful to us (but that's another issue to deal with...).