Allied forces have also committed atrocities (Rape of Berlin by Soviets, Americans mutilating Japanese POWs and rape of Okinawan women). You just never hear about it because "the good guys won." And the winner of the war gets to tell the stories.
Don't get me wrong, the Axis were the greater of the two evils. But pretending our own forces were stand-up guys is just plain ignorance and denial.
While your point is true, ask yourself whether during WWII you would rather have your town (a non-combatant) occupied by (a) the Nazis; (b) Imperial Japan; (c) Soviet Russia; (d) the United States; or (e) Great Britain. Likewise, which nation would you rather be a POW of?
It's not even in the same stratosphere. The first two are incomparably worse, the third somewhat better but still terrible, and the last two are (by the standards of the day and the conflict) incomparably better. So yeah, I would call them stand-up guys on *average*, relative to the rest of the world at the time. The Allies did not fight with innocent motives, and they fought with extraordinary ferocity, but holy hell it's almost impossible to overstate how terrible the enemy was. An American or British POW camp was practically paradise -- overall -- compared to the unspeakable horrors that awaited you in an Imperial Japanese, Nazi, or Soviet internment.
But the worst of them? By FAR Imperial Japan. It should never be forgotten how horrific their POW camps were. Even the Nazi POW camps were far, far better. Absolute number one for unrelenting horror. And yet you will still find people who are tempted to make moral equivocations, as if one was somewhat worse, but hey they were both pretty bad. That's outrageous. People should never forget the reality.
http://en.wikipedia.org/wiki/Prisoner_of_war#Empire_of_Japan
"The Empire of Japan, which had signed but never ratified the 1929 Geneva Convention on Prisoners of War,[35] did not treat prisoners of war in accordance with international agreements, including provisions of the Hague Conventions, either during the Second Sino-Japanese War or during the Pacific War because the Japanese viewed surrender as dishonorable. Moreover, according to a directive ratified on 5 August 1937 by Hirohito, the constraints of the Hague Conventions were explicitly removed on Chinese prisoners.[36]
Prisoners of war from China, the United States, Australia, Britain, Canada, India, the Netherlands, New Zealand, and the Philippines held by the Japanese armed forces were subject to murder, beatings, summary punishment, brutal treatment, forced labour, medical experimentation, starvation rations, poor medical treatment and cannibalism.[37] The most notorious use of forced labour was in the construction of the Burma–Thailand Death Railway. After 20 March 1943, the Imperial Navy was under orders to execute all prisoners taken at sea.[38]
According to the findings of the Tokyo Tribunal, the death rate of Western prisoners was 27.1%, seven times that of POWs under the Germans and Italians.[39] The death rate of Chinese was much larger. Thus, while 37,583 prisoners from the United Kingdom, Commonwealth, and Dominions, 28,500 from the Netherlands, and 14,473 from the United States were released after the surrender of Japan, the number for the Chinese was only 56.[40] Of the 27,465 United States Army and United States Army Air Forces POWs in the Pacific Theater, they had a 40.4% death rate.[41] After the war, it became clear that there existed a high command order – issued from the War Ministry in Tokyo – to kill all remaining POWs.[42]"
So yeah, we should acknowledge that Americans did abuse their POWs on occasion. But it was like night and day compared to the horrors of Imperial Japan. Why? In large part because the American forces were "stand up guys" compared to their Japanese counterparts. This in large part is what bothers me, the tendency to make excuses and moral equivocations for the Imperial Japanese, to forget that they were in many contexts (such as their unspeakably savage treatment of POWs) far worse than even the Nazis.