Go read a history book. Concentration camps were almost always located a mile or two out side of a town. Everyone knew, and everyone turned a blind eye to it. I went to school in the south. The school was 10miles away from a Perdue Chicken plant. On a hot day with a calm breeze, all I could smell was chicken crap and rotten chicken parts. So imagine piles of dead bodies, must smell pretty good and you think the people never cought a "wiff" of that in a town less than mile or so away? RIGHT!