David Atkins, The Brutal Neoconservative Legacy in Iraq, pretty much says the same stuff I wrote here. Very basically, Atkins points out that the neocons have continued to justify the invasion of Iraq by claiming that getting rid of Saddam Hussein would be good for America in the long run.
But over a decade after the invasion and with Iraq seemingly entering a disastrous sectarian civil war, it seems abundantly clear that whatever the long-term effects of the invasion may be, the near to mid-term result has been to empower Shiâ€™ite theocrats in Iran, and to radicalize Sunni factions in Iraq. As of this writing, Sunni extremist groups expressly intent on establishing a global caliphate are threatening to overrun Baghdad. The corrupt Shiâ€™ite government of Nouri Al-Maliki is counting on and receiving support from the Ayatollahs in Iran.
Neither of these developments have even a silver lining behind them.
It wasn’t just the invasion, but the gross mismanagement of the occupation/nation building phase that came after pretty much guaranteed that the invasion of Iraq will always be counted as one of the greatest foreign policy bleep-ups of all time. I’d say it’s got Napoleon’s invasion of Russia beat by a mile.