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?
That's peak crybully shit.
The SPD very clearly signalled who they were willing to work with and who they were unwilling to work with. History stands as testament to this.
Blaming the KPD for having the correct line on social fascism and recognising the SPD for what it was is political victim-blaming.
This is pure speculation but I could guarantee you that if the KPD had collaborated with the SPD then they would have been scapegoated for it. Instead they took the correct line and resisted, and they get blamed for being too intransigent and engaging in factionalism that facilitated the Nazi rise to power. It would have been yet-another example of that unfalsifiable orthodoxy.