Finally, a “brusque ultimatum” arrived from SS Obergruppenführer Heinrich Müller demanding that Jebsen [a double agent working for the British] be handed over to the Gestapo at once. Among the murderous sycophants surrounding Hitler, Müller stood out for his brutality: the head of the secret state police, he was a principal architect of “the final solution,” directed the SS murder squads that followed the German army into the Soviet Union, and personally presented Himmler with evidence of [Admiral] Canaris’s [head of the Abwehr, military intelligence] links to the anti-Nazi resistance. He loathed anyone with an education–“One really ought to drive all the intellectuals into a coal mine and then blow it up,” he declared–and he was not a man who took anything but yes for an answer.
From Double Cross: The True Story of the D-Day Spies, by Ben Macintyre