Snip:
... As with many other aspects of the president's sometimes odd behavior, the root of this new self-subverting plan lies not in political expediency, in the advice he's received, or in his intellectual abilities as such, but in a psychological twist that begins with his long and well-documented history of failure (and his sense of his own failure) within his family of origin.
... To protect his psyche against humiliating feelings - inadequacy, isolation, incompetence, guilt - Bush has developed during his life several defenses that suppress, disguise and deflect those feelings. These defenses have included alcoholism, clownish behavior, emotional bullying, and Christian salvation. Six years ago, Bush found what must seem to him the near-perfect defense (though it was also a trap): The "presidential defense" allows him to avoid any feelings of humiliation by presenting himself as the plain-spoken, divinely inspired "decider" whose choices can't be seriously challenged as incompetent or inadequate, because only distant history (or a guiding Divinity) can judge a president's actions...