Several factors contributed to the initial skepticism:
Lack of concrete evidence: In the early stages of the war, there was a lack of concrete evidence or photographic documentation of the atrocities being committed in the camps. Many reports were based on eyewitness accounts or testimonies from escapees, which could be dismissed as unreliable or exaggerated.
Propaganda and disinformation: Both sides engaged in intense propaganda during the war, and there were concerns about the spread of misinformation and rumors. Governments were cautious about accepting unverified reports to avoid being misled.
Limited intelligence: Gathering intelligence during wartime was challenging, and the Allies had limited resources and access to information from within enemy territories. This made it difficult to obtain accurate and comprehensive reports on the conditions and events inside the concentration camps.
Hope and denial: Many people, including government officials, found it difficult to comprehend the scale and brutality of the Nazi genocide. There was a reluctance to accept the existence of such atrocities and a hope that the reports were exaggerated.
However, as more evidence emerged and the situation became clearer, the United States and its Allies gradually acknowledged and condemned the atrocities taking place in the death camps. The liberation of the camps and the subsequent discovery of mass graves and human remains provided undeniable proof of the horrors that had occurred. As the war progressed and more information was gathered, the initial skepticism gave way to outrage and determination to bring the perpetrators of these crimes to justice.