He's right. Everything depends on perspective. If your perspective is that Rumsfeld's (and Cheney's, and Bush's) decisions were carried out as planned, then it was a success. They meant to do this shit. They just refused to listen to the people who repeatedly tried to warn them of the likely consequences.
And that is how history will judge them. They're not going to be naming schools after these idiots, not here and not in Iraq. Get used to it, and don't go away mad, boys -- just go away.