For the sake of historical accuracy, some camps were classed as "arbiter lager's", and were tied to the production of various war items including the V1 and V2 weapons. Of course the Nazi's had the food ration calculated to extract the most work for the least calories, with death of the poor workers being a result. The major camps that existed only for the murder of "undesirables" were in Poland. I thought it was brilliant on Patton's part to expose the German citizenry to "kulture of the Reich". There are revisionists who have agendas that don't include the truth. Shame on them.