The issue is a little too deep to go into detail about it here so i'll just generalise.
Saddam was a parasite that had to be removed. To be blunt, if I had the military might and technology that the Americans possess, I wouldn't hesitate to drop any ammount of bombs (regardless of cost) on Iraq to clean him out. I don't care about the legitimacies of going to war or if it were "legal" or not because it needed to be done.
The war on terrorism though is a topic my opinion has changed on. Initially (Sep 11 onwards), terrorism was something that needed to be stopped completely and Bush used scare tactics to convince Americans and the western world that it needs to be stopped. However, terrorism isn't something that can be swept up under the rug in a matter of years, you can't win the war on terrorism. It's not like winning a war against a country and all of a sudden it's all over. Terrorism is a mentality that in my opinion will be near impossible to get rid of. If someone decides to walk into a subway with their chest strapped with TNT and pushes the button, that's terrorism. It's something that will be too hard to eliminate. The thing I don't agree with is the terror warnings. Suddenly one day increasing the terror threat from "orange" or "red" (or what ever it is) because intel have increased fear something may occur. It's scaring the public unecessarily and I don't really see what it achieves, apart from convincing the public that they think they know what they are doing.