No. Though Saddam was a dictator the US did not justify their action and rushed the decision. In the end it is not even clear what the aim was.
Secondly they payed no heed to the complexities of the region - they still dream of a democratic Iraq when it looks rather as if the post state will disintegrate without Saddam, very much like Yugoslavia did after Tito.
To the defense of the US it must be said that most similar post-WWI constructs eventually disintegrated (Yugoslavia, Czechoslovakia, even the USSR), so it is maybe unavoidable.
Even Belgium (which is post-Napoleonic artificial construct) is on the brink of falling apart.
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