WW2 imagery

USA WW2 Propaganda:

Source:

One of a series designed by the Douglas Aircraft Company, Inc. under its material conservation program. Courtesy of the National Archives and Records Administration.

Description:

If the USA conserves material and doesn't waste her resources, we'll "trap the Japs" who are depicted by a brown mouse with buck teeth, round glasses, and a rising sun military cap. It's anti-Japanese propaganda.

Reaction:

That's not racist at all.

Nazi Germany WW2 photography, in a way. The Einsatzgruppen were German "police" who combed captured territory (after the army had taken it over) and searched, captured, and killed Jews:

Source:
From the Main Commission for the Investigation of Nazi War Crimes.

Description:

In this photo, a German policeman shoots individual Jewish women who remain alive in the ravine after a mass execution. (1942) The Einsatzgruppen where special forces dedicated to finding Jews and bringing them to concentration camps; when transporting them proved too inefficient, the Jews where massacred outside of the towns and villages where they were found. 
Reaction:

It is astounding, shocking, and horrific that the Third Reich would dedicate special forces to killing Jews-- forces that would search through records and roam the defeated territories in order to find and murder innocent people--and then would take the time to make sure that none survived.

WW2 Photography (USA):

Source:

Arland B. Musser, US Signal Corps.

Courtesy National Archives, Washington D.C.

Decsription:

American Soldiers from the 45th Infantry Division lined up, shot, and massacred German Prisoners of War in the Dachau Concentration Camp. Dead German soldiers lay against the length of the white wall, one-fourth of which is shown here, and the soldiers still standing were shot after the picture was taken. U.S. soldiers killed tens of German soldiers, many during the liberation of the camp but at least a dozen after they had surrendered.

Reaction:

All's fair in love and war. Many of the American Soldiers were reacting to the mass killing of Jews they saw throughout the concentration camp, a massacre that far surpassed that of the U.S. soldiers themselves. I wouldn't justify their actions, but the way they reacted is certainly understandable. Dead bodies filled train, the gas chambers, and the crematory.

So it goes.