Ruv, I would love to give pages over to exploring the mindset of Germans traveling from pre Nazi social customs and behavior into the gradual establishment of the post Nazi new world but it would put the brakes on a fast moving novel. Nicht wahr?
I know that's a rhetorical question Doc, but I guess that my literal answer is: I don't know that history has to put the brakes on action. I mean, in a literary sense that's what history
is: action and dilemmas around social change.
I'm currently writing a steampunk pseudohistory about the evolution of privilege in an Edwardian imperialist world where WWI never happened and the Bolshevik rebellion failed. It's a pretty fast-moving novel featuring battles in the Soudan, a riot in London and intrigue and scandal among the British aristocracy --
and I have to spend time showing how steam-powered police units work when there are no electronic computers, and why Britain has railroads but not electric lighting, telephones or telegraphs. But it hasn't transplanted 21st century urbanity to the period. I'm using the period as much as I reasonably can, subject to certain deliberate adaptations.
My personal approach has been to not discuss any of it in detail. Just describe the obvious things, let the story happen, focus on action and dilemmas, let characters reveal their motives and beliefs and (hopefully) the sense of milieu and history will emerge with minimal info-dumps. But that's the intended reader experience. As an author I've had to read a tonne of stuff and form my own views -- so I do a lot of infodumping on
myself. In terms of design, it's slow going for me, but hopefully not for the reader.
Speaking of evolution of Nazism though, have you read Jonathan Littell's
Les Bienveillantes? (Translated as 'The Kindly Ones' in its US editions). An American author writing a French novel about the fictional memoirs of a Nazi SS officer running an extermination camp. At 1,000ish pages I doubt that it's fast-paced, but it won two of the most prestigious French literary awards in 2006, and has since divided the literary world. Literary Review review
here. LA Times review
here.