What the hell? Because of presidents like Bush, you're able to voice your opinion. If you don't like the way America is run, LEAVE! Go live in Iraq and Afghanistan and see how life is without opinion and without freedom.
Neither Iraq or Afghanistan were threats to the USA.
However it is important to note that the world security balance is much different to what it was in WW2. Hitler actually had a chance of conquering most of Europe and Central Asia.
However while the USA has gradually been taking over certain regions of the world either culturally, through espionage or through war they simpl cannot take on the larger powers like India, China, Russia, Europe or Brazil and expect a positive result. Therefore while Bush may be as bad as Hitler (as a person) he cannot go as far. Instead we just have to watch him choke starving little African and Middle Eastern children to death with heavy handed politics instead of fighting directly against his 'empire'.