Patrick Cockburn has done some of the best Iraq reporting, and he's of course correct to point to the outcome of the war as the dissolution of the Iraqi state (involving an unspeakable tragedy for the Iraqi people, the vast waste of human and financial resources, lasting political instability from which we may never recover, etc. etc.) yet his title: That's the way Bush and Blair wanted it -- promises much more than the article delivers.
Let's say it clearly: the purpose of the invasion of Iraq was to destroy Iraq.
For two reasons:
a. To destroy a potential opponent of Israeli hegemony
b. to sustain the momentum of a permanent war agenda by homegrown irrational American radicals bent on destruction for the sake of destruction: war for the sake of war. If this seems counterintuitive, that's because we're normal people.