Well, read all the way through. He blames a lot of parties.

Also, do you actually hold the Bush administration blameless on this one?

I don't think there is much doubt that the administration ignored several of its own internal critical resources, including the Army Corps of Engineers. Whether they did so based on a clear resources calculation or some other basis isn't clear. What is also pretty clear is that FEMA, despite a powerful mandate, has utterly failed in its core mission, as has the "all hazards" approach of homeland security. Not that prevention was possible, but certainly preparation would have been.