" That concentration camps were ultimately provided for the same groups in all countries, even though there were considerable differences in the treatment of their inmates, was all the more characteristic as the selection of the groups was left exclusively to the initiative of the totalitarian regimes: if the Nazis put a person in a concentration camp and if he made a successful escape, say, to Holland, the Dutch would put him in an internment camp. Thus, long before the outbreak of the war the police in a number of Western countries, under the pretext of "national security," had on their own initiative established close connections with the Gestapo and the GPU [Russian State security agency], so that one might say there existed an independent foreign policy of the police. This police-directed foreign policy functioned quite independently of the official governments; the relations between the Gestapo and the French police were never more cordial than at the time of Leon Blum's popular-front government, which was guided by a decidedly anti-German policy. Contrary to the governments, the various police organizations were never overburdened with "prejudices" against any totalitarian regime; the information and denunciations received from GPU agents were just as welcome to them as those from Fascist or Gestapo agents. They knew about the eminent role of the police apparatus in all totalitarian regimes, they knew about its elevated social status and political importance, and they never bothered to conceal their sympathies. That the Nazis eventually met with so disgracefully little resistance from the police in the countries they occupied, and that they were able to organize terror as much as they did with the assistance of these local police forces, was due at least in part to the powerful position which the police had achieved over the years in their unrestricted and arbitrary domination of stateless and refugees. "

― Hannah Arendt , The Origins of Totalitarianism