If you're not worried about war, then you have a problem. I worry for the safety of my friends and colleagues in theater, and I wish I were there to help. However, I know that they are part of and protected by the finest military that the world has ever seen.
I also know that the Iraqis have no earthly idea what they are facing, and that the storm this time will be faster, more accurate, and more lethal, and that those who choose to oppose us will be annihilated, plain and simple. While there will likely be some fanatics who will fight to the bitter end, I think more wiser sorts will see the futility of fighting and the possibility of ridding themselves of Saddam and will lay down their weapons in the same way they did in '91.
Terrorism still poses an enormous threat, but eliminating this current and future base for terrorist operations and funding will go far to reducing that threat as well. One of the problems people seem to be having is connecting a safe haven and potential money and weapons source with the war on terror. It's all connected, and all needs to be addressed at some point.
It's likely we'll never win the war on terror if that means eliminating it completely, but we can certainly dismantle and destroy the web of Islamic-based terrorists and countries which have used terror to attack the West and who seek to impose Islam on the world's populace.
Wars are never fought without casualties.
The tree of liberty must be refreshed, from time to time, with the blood of patriots and tyrants. - Thomas Jefferson, 1787
Both patriots and tyrants will lose their lives in Iraq.