"I do not believe the Communists could risk any action, for their leading elements, like most criminals, are in our concentration camps. Here something needs saying: After the war it will be possible to see what a blessing it was for Germany that, regardless of all humanitarian sentimentality, we imprisoned this whole criminal substratum of the German people in the concentration camps; and for this I claim the credit. If these people were going about free, we would be having a harder time of it. For then the subhumans would have their NCO’s and commanding officers, they would have their workers’ and soldiers’ councils. As it is, they are locked up, and are making shells or projectile cases or other important things, and are very useful members of human society."
January 1, 1970
https://en.wikiquote.org/wiki/Concentration_camp