During the short break on Yom kippur, A middle aged man told me about how his father, may he be well, was with the American Army when they liberated one of the camps.
He said that the American soldiers were absolutely disgusted and appalled by what they found. After a few days, the American soldiers (presumably christians) just could not stand the sight of the germans any more. So the American rounded up the germans, and then the Americans took justice in their own hands.