I don't understand the appeal of a revisionist history that absolves the SPD of paving the way for Hitler. Doubly so a revisionist history that somehow, after all the sacrifices and all the horror, pretends that the Nazis could have been defeated with electoral politics.
The very basic premise just sounds like a revisionist re-writing of history to pretend the SPD didn't have a critical role in destroying the "Good Future". It promulgates the idea that fascism can be defeated with liberal electoral BS in what was, historically, the most stern rebuke of liberal democracy in history. I don't get it. Who is this for?
You are able to work with them toward the end of the game. Like the paramilitaries can reach a strategic alliance, they can back the counter-revolution against the fascists, and they can be convinced to back the SPD chancellorship.