People always fail to recognize a mass atrocity when they are a part of it. From things as small as "art" left by tourists on ancient steles, to the lynchings in the square, or even more typically, full-scale wars. It always takes a long time before they finally feel the pain and truly reflect on what they have done. 
WWII was exactly a mixture of these tragedies. The camera has faithfully recorded the cruelty of war: missiles, gunfire, building ruins, and countless sufferings. In front of these