Even if the Nazi Party largely came to power because of the impact of the Versailles Treaty, that does not mean that the Nazi Party would have fallen from power if those "injustices" had been reversed.  Indeed the Nazi Party would have claimed credit for any reversal and concluded that hanging tough with the allies is the way to achieve results.  Sometimes history simply isn't reversible even when previous mistakes have been recognised and corrected.

Indeed you could even make the converse case: that the Nazi party rose to power because Versailles wasn't sufficiently draconian or enforced to keep people like the Nazis down.

I don't subscribe to either theory. WWI was an abomination against all peoples, and virtually all national elites were almost equally to blame.  Putting the blame almost entirely on the losers certainly saved the ruling elites of the victors asses and set the scene for a rematch.

But Germany could also have responded positively to that defeat in WW1 - as it did after WW2 - admittedly largely because of a much more positive US input.  And then saving the winning ruling elites asses didn't do the UK any favours whatsoever.

But the greater problem is class war and the industrialisation process which created such savage tensions.  It seems that now - after 40 years of heeding those lessons we are back on the same old road of increased inequality and class war - leading almost inevitably the wars - now almost global in scope.

Why is it that the lessons of even a world war only seem to last for a generation  or two?

Index of Frank's Diaries

I don't think the Nazi regime can be blamed on Versailles.

The initial nationalist impulse may have been triggered by Versailles, but without economic chaos - and class war, and funding by both German and US industrialists - the Nazis would have remained in the crank corner.

If anything, the Nazis were a creature of the Depression. If the US Depression hadn't kicked the legs out from under the German economy, it's unlikely they'd have been more significant than the Tea Baggers have been so far - if that.

Clemenceau had to have his pound of flesh. No one can say "Who could have known?" Keynes laid out the consequences over the next 15 years almost as if he were writing history in The Economic Consequences of the Peace. But how things played out in actuality is very complicated and, I strongly suspect, the records of some of the most important elements, including the financial aspects, were destroyed or have yet to emerge. But the hyperinflation in the early '20s that destroyed most of the German middle class economically was clearly the result of Versailles and the subsequent French occupation of the Rhur, which paralyzed the ability of German industry to manufacture goods which could have given use and meaning to the Papiermark.

As the Dutch said while fighting the Spanish: "It is not necessary to have hope in order to persevere."