I am not convinced that people did not resist Hitler early, given what I see these days. I imagine that the (early, non catastrophic) resistance stories simply got lost to time and to the real and widespread catastrophe that followed. It seems very likely that people noticed, spoke out, took risks, said and did what they could.
We assume that everyone was all in because thinking of Germans and then the world as dupes simplifies things vs. assuming there was a struggle, which lost.