Frankly I think that the nod to the Holocaust theme was simply not there Without a visial linkup to the concentration camps at least not wout using OR or having familiarity with the song and one has to listen very very carefully to even hear the words arbeit macht frei the reference doesnt even belong We arent talking about the Shantih Viriditas  that has already been determined in prior posts here That being said at least there was a clearly observational component to it The arbeit macht frie reference is nowhere near as clear A pity that Cuaron didnt have it spraypainted inside of Bexhill or something simply having a song wherein the words are barely audible after the third listening doesnt seem to arise to the standards necessary for inclusion I think it should be purged altogether as it cannot be referenced outside of one reviewers reference that it is playing subtly in the background