You raise a critical question. Which leads to two other questions:
Has Iraq already attacked us? IOW, has Iraq in any way been involved with past terrorist attacks on America--not just 9-11, but the 1993 WTC bombing, the USS Cole, etc.? Has Iraq sponsored, sheltered, or in any way supported the perpetrators of those dastardly deeds? If so, then for us to strike back at Iraq would not be a "preemptive" "first" strike.
The other question is this: Does Iraq pose an imminent serious threat to America? The analogy would be of a dangerous madman who hates your guts and has a gun pointed at you and your family. You do not have to wait until he pulls the trigger for it to be self-defense.
I think it likely that the answer to one or both of these questions is "yes." But I do not yet have definitive proof either way to give an answer. I hope that before any attack on Iraq, President Bush would present such evidence to Congress and gain a declaration of war.
Is this a just war?? IF they are planning to sell biological weapons to those that would harm us..yes it is just..If it is not GWB will have to answer to God for it..