Satyagraha takes two sides - a protagonist to undertake it, and an antagonist capable of shame, introspection, and with the capacity to relent. Ghandi's satyagraha worked because the British satisfied the latter requirement. A pan-European satyagraha against Hitler, for example, would not work. A cynic might even argue that a modern Arab satyagraha against the Israelis would work (it's about the only thing that hasn't been tried), but one also suspects that an Israeli satyagraha against her Arab neighbors would be, shall we say, somewhat less successful. Satyagraha allows for stirring moral victories, but they're not as appealing when the power being resisted against will unhesitatingly wipe out all the satyagrahis in question. Ghandi's own answer on the applicability of satyagraha to European Jewry during the second world war was far from satisfactory.