Interesting article I found about the German resistance in 1936
marxists.org
Josephine Herbst
The German Underground War
I. Anti-Nazi Feeling Rises
Published: The Nation, January 8, 1936.

How long will the psychological reasons for submission to Hitler hold in the face of continuing economic instability for the great mass of people? Hitler has been successful in selling to the Germans the idea that he saved the country and all Europe from bolshevism, and that bolshevism is a destructive force, a strictly Jewish movement. Lately the term bolshevism with too much use has begun to lose its sharp edge. The Catholics also have been accused of bolshevism. The result has been to throw them into the opposition movement. In the Saar one of the illegal papers of the underground movement appears with the hammer and sickle combined with the Catholic cross. A priest about to be arrested was warned by the underground route; his house was surrounded by workers and peasants from the neighborhood, few of whom were Catholic, and the troopers coming to arrest him turned back at the sight of the dense crowd.

The existence of the underground movement is denied in the legal press, but twenty illegal papers come out regularly in Berlin alone. Hundreds of others appear irregularly. The papers are distributed by children and by workers during their working hours. The penalty for distributing such contraband may be the concentration camp; it may be death. Strikes are treason, and leaders are punished by death at the hands of a firing squad or by sentences to concentration camps. Yet strikes go on. Dozens occurred last summer, especially in the metal trades. Sometimes the strike consisted in a passive laying down of tools for an hour. Sometimes work was merely slowed up, “sticking,” as they term it, “to the hands.” Demonstrations used to be made for the release of Thälmann, the Communist leader, but lately there have been none, and it is not known for certain whether he is alive or dead. Only Germans who get their information from the legal press have any illusions about the so-called “bloodless revolution” of the Nazis; blood has flowed and is flowing. But if this last year was marked by the further concentration of wealth in the hands of the big industrialists, it is also notable that in the same period the underground movement made its greatest progress.