2 cents before lockout
The term war crime has undergone a tremendous expansion recently. Primarily due to its use by the political left and the mass media's unquestioning repetition of everything they say. Another problem is that our enemies today don't have the personal and national honor to wear unifroms.
As far as the statement "war crimes being the norm", and "mindset of a war criminal", these are highly emotionally charged phrases, and indicate a predisposition toward judgement that the rest of your question claims to deny. In other words, it SOUNDS like you have already made your mind up, while you claim otherwise.
What is a "war crime"?
For some people, those who rant about the "illegal, immoral war..etc..", virtually everything our troops do is a war crime. To them, our mere presence in country is a crime. This can be (and is) argued, but it has no place in a discussion of "war crimes".
War crimes are crimes, outside the normal customs of war. Mistreatment of prisoners and genocide are examples. Just because some one calls something a war crime (because it is a bad thing, and happens during a war), does not make it an actual war crime. Bad thing happen in war. Generally, this is why we try to avoid war.
We are living is a sensitive age. Or at least SOME people are. things that offend their sensitivities are, to them, crimes, and in war, war crimes.
Abuse of prisoners. Considered a war crime. However, not everybody sees it the same way as some do now. Look at history. Look at the Nurenburg trials. War Crimes, and how they were defined then, as compared to now. Abuse of Iraqi prisoners at the Abu Graib (sp?) prison. Called a war crime, and soldier prosecuted for the mental torture of prisoners.
During WWII, abuse of prisoners was things such as starvation, beating, unwarranted execution, and medical experiments. Forced labor, for soldiers, not officers, was not. Forcing a prisoner to march around naked was not a war crime. Throwing a naked prisoner in a tank of ice water to see how long he lived, was.
Genocide, seems pretty self explanatory, doesn't it. But it depends on how you define it. Rounding up a village of civilians and shooting them is a war crime. Shooting individual civilians during combat is not a war crime. It is sadly, just one of those things. A mistake. A tragedy, but not a war crime, as this is a normal occurance in war.
Bombs dropped from aircraft have killed hundreds of thousands (possibly millions) of civilians, and these are not considered war crimes. They are within the normal customs of war.
The situation in Iraq is further confused by the fact that the enemy (whatever term you use for them) do not wear uniforms, they dress just like the civilians, they represent no recognised government with which discussion is possible, are not signatories to any international treaties on the conduct of war and they do not recognise any of the rules of war, as recognised by those nations who have signed the treaties, makes it a very difficult situation for determining the proper course of action.
In answer to your question on whether or not the Bush administration, and/or military leadership is responsible for war crimes, the answer is:
Yes, under the recognised conditions of chain of command responsibility. By that I mean, the highest level of command that ordered, or KNOWINGLY allowed war crimes to be committed is responsible.
Is the President responsible for war crimes? In the general sense, that as Commander in Chief he is responsible for ALL military actions, yes. In the legal sense, if he ordered them, (and it can be proven) yes. If they went on with his knowledge (of the specific action), yes. Otherwise, no.
Is the military command responsible, yes, just like the President. At the lowest level. If it was ordered, or they had specific knowledge and allowed it, yes. Otherwise no. If a platoon massacres a village, and the company commander had no knowledge he is not legally responsible. If the battalion commander had no knowledge, the battalion commander is not responsible. Neither is his boss, the General. The responsible party is legally the platoon commander. Higher level commanders have an ethical and moral responsiblity for the actions of their subordinates, and they pay a price (their career) when their subordinates disobey orders and commit war crimes, but they are not legally responsible, unless they ordered it or knowingly allowed it to take place.
FYI, my personal opinion is that the MPs running that Iraqi prison (that I can't spell) should not have been prosecuted for "war crimes" The prisoners, while humiliated, and threatened were not (as far as any info I have seen) physically harmed. The should have been prosecuted, because what they did was wrong, but it should not have been given the label "war crimes".