The Fact in Bush is the one who undermined the UN and went into iraq despite their warnings and objections ,
If they object to fulfilling something they agreed upon, then they are just a paper tiger. Let me put it this way, they had one resolution saying Iraq should be invaded, whether or not anyone did anything about it for over a decade.
Now, they did not pass a resolution saying "Do not invade Iraq", which is the only thing that would over rule their previous resolution.
And before you said they did, they did not. As even if everyone else in the UN had wanted that, it would require the support of 2 UN members in particular, Britain and the USA, who obviously aren't going to veto their own resolution.
Kofi Anan is not the UN, Only 5 nations in the UN matter; America, Britain, France, Russia and China. All 5 agreed that force should be used on Iraq, and all 5 did not agree whether to ignore their previous decision.
Now, I realise this is not why America invaded Iraq. Im not stupid.
But you aren't arguing America invaded for the wrong reasons, you are arguing it was wrong to invade Iraq.
It was the right thing to do to invade Iraq, it was just done for the wrong reasons.