I think that as the epithet "fascist" has completely been voided of all meaning it might have once had, and as people grow tired of using Hitler and the Nazis as shorthand for "unspeakable evil that we can't even comprehend", the Nazi period will be reviewed more calmly as just another period of history (one in which horrible crimes were committed, certainly, but not something aberrant to human history, which is filled with atrocities). When that happens people will be able to discern what was German, what was particularly Nazi and what processes led to mass murder. It will also be useful to Germany because it will need to reclaim some parts of its past if it wants to have a future. It can't denounce anything and everything that happened between 1933-1945 - that would be like saying everyone who likes dogs is clearly evil because Hitler liked dogs. QED.
I view both Fascism and National Socialism as being not reactions to but instead products of early 20th century modernism. Not so much in the outward images (after all, there was some reaction to Weimar's excesses) but rather in the attitude toward overarching change and the view that WWI was a disruptive event that fomented deep societal transformations, not all of which were ultimately positive. Have you read Modris Eksteins's The Rites of Spring? It makes some cogent arguments along these lines.
I do need to reimmerse myself in recent scholarship, however, as I believe there have been some recent research trending in the directions you mention above.
Je suis méchant.