Since Glenn Greenwald's article is of a fair amount of length, I won't cite the entire article here. It is, however, definitely worth a read, and I ask that you read before continuing on with my post.
If Bush is, in fact, Nietzschean in his outlook, would that make him, and by extension, his lackeys, nihilists? I would argue that the problem of corruption at the top levels of government is far older than six years. That said, Bush has taken that initial flaw, and instead of ameliorating it, has chosen to take it to disturbing extremes and added a strong thread of cronyism. Macchiavelli did not describe things as they should be. He described things as they really were. A few years ago, I would have hoped that we have progressed since then, but Bush has given lie to the dreams of my youth. In conclusion, I could find no meaningful flaws with Mr. Greenwald's arguments.
Enjoy the music.