Banquo:

Nice try (and I agree with a number of your points) You are wasting your time.

Nixon is history, and therefore not so bad (but he was a crook, and knew it/considered himself above the law).

Bush is current, and therefore the acme of evil (i.e. only that which I personally have experience with can be viewed as the "best" or "worst," it is impossible that the best or worst preceded me).

His detractors will brook no "gray area" assessments and cannot find ANY other explanation for his foreign policy decisions aside from abject stupidity, greed and/or religious fanaticism.

Give Bush 35 years and some calmer reflection will be allowed. For now, he must serve as the Emperor to Sen. Obama's Luke.