I didn't read the article, but I came to the conclusion long ago that Bush isn't a bad guy, just a bad president.
Of course it's far too early for this, but I think that in a few years historians will look back at the Bush presidency as a battle for control of the Republican party. There really were larger forces at work in the Bush administration. I'm not talking any of that conspiracy-theory "Cheney really runs the world" crap, but the ideological struggles were present from day one. In his first term, he had the Cold Warriors (Cheney and Rumsfeld) vs. the new school (Rice and Powell). Old school won, so we end up with Iraq, Cheney's Energy Task Force and the departure of Colin Powell.
In his second term, it's almost a 180 degree shift. Rumsfeld and Wolfowitz are out, replaced by Gates; Rice is promoted to Secretary of State (although there are those who say this was a golden parachute, to prevent two high-profile defections from the administration); Cheney virtually disappears to his undisclosed location. Bush of the last 4 years is a great improvement over the first four, and I think what you see there is the expulsion of the more radical elements of his administration, and him getting back to who he really is.
People fail to realize that George W. Bush is NOT a neo-con. He crushed the democratic challenger for the governorship of Texas in 1998, becoming the first Texas governor to win re-election in 50 years, I believe. He overwhelmingly carried the Hispanic vote, and you just can't do that on a platform of "conquering the world". Speaking of which, the immigration reform attempt is the perfect encapsulation of his administration, I believe. Bush wanted to take a moderate, comprehensive approach to immigration, yet he was defeated primarily by the more extreme elements in his own party. This has been the story of his presidency, but he did bring it on himself. He mobilized the base to win re-election in 2004, and it turned on him.
There are some things that are just beyond the control of any man: September 11th, Hurricane Katrina (once again: it was Karl Rove's idea to do the universally panned fly-over picture), the sub-prime mortgage crisis. Bush responded poorly to all of these disasters, yes. I wouldn't argue otherwise. But people try to place blame on him for them occurring in the first place, which I think isn't fair.
In the end, I think Bush will be looked at as a low-to-bottom tier president. Sadly for him, he was not the type of leader that could handle extraordinarily difficult times, both in foreign policy, natural disasters, domestic policy and within his own party. He's a bad president, but I wish people would stop viewing him as an evil man.