@BillRM,
Have you heard of a thing called universal indicator paper? It tells the relative acidity or alkalinity of something. There's a spectrum. Now for someone like yourself who can only think in absolutes, black or white, acid or alkali, you may find it hard to accept that something like that would exist, but real scientists don't think in such simplistic terms.
The SS took over many branches of government, and when they did those that worked there became part of the SS.
Quote:As the Nazi party monopolized political power in Germany, key government functions such as law enforcement were absorbed by the SS, while many SS organizations became de facto government agencies. To maintain the political power and security of the Nazi party (and later the nation), the SS established and ran the SD (Security service) and took over the administration of Gestapo (Secret state police), Kripo (criminal investigative police), and the Orpo (regular uniformed police). Moreover, legal jurisdiction over the SS and its members was taken away from the civilian courts and given to courts run by the SS itself. These actions effectively put the SS above the law.
http://en.wikipedia.org/wiki/Schutzstaffel
There are degrees, a fanatical Nazi member who joins the SS at the first opportunity is very different from a policeman who turns up for work to find out that he is now an SS officer.
I wouldn't expect you to understand this, just stick to your absolute world of black/white, alkali/acid, you should find it more comforting. The real world is so much more confusing.