As for international terror, I don't sign on to the concept because it is too large, I'll stick with the one's who terrorize us, you can advocate attacking Ireland if you want to make it that broad. I'm in favor of hunting down and eliminating every swine who is involved with the scum who attacked us. One at a time if necessary. That goes for eco-terrorists in this country.
Saddam is an evil force, I don't have enough info to know if he is a threat, so I have to trust our government on that right now, but trusting the government is a risky business at best, and perilous at worst.
The administration doesn’t sign onto the concept of war on only those responsible because tracking a few dozen or hundred people across the world is too disruptive, and would insight more against us if we pursued policies to force it (like sending assault teams into Pakistan, Saudi Arabia or God knows where else one guy might be hiding.
The Ireland analogy is an absurdity because Bush has stated several times that we are going after terrorists with international reach (not to mention that the Irish government is not complacent AFAIK).