What do you mean by justified? Morally? Strategic? Those are very different things
"Justification" always means moral justification.
But in terms of strategy, the ingoing strategy of Rumsfeld and Wolfowitz was also critically wrong--and the generals told him so. In fact, the Army Chief of Staff disputed Rumsfeld publicly on the error of the strategy to the point that Rumsfeld fired him. All of the senior 4-star generals--the ones who had been junior officers on the ground in Vietnam--had to resign in order for Rumsfeld to have his war.
It was so strange--the Iraq war was one that the military actively resisted. The generals did not want it, intelligence advised against it. They said this publicly as much as men under orders could, and it came out in the media, but not even the generals could hold back the dogs of war. Even when Rumsfeld bristled in public, "War is not a military decision, war is a political decision," everyone still clamored for war. America had gone insane. Or there was a principality of war involved.
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