Quite so. But then my question would be: How did it get to the stage that a violent sociopath was able to motivate a whole country into doing these sorts of things?
Remember, this is my quote: "You know, we could have got the same result without having to kill each other by the millions if only we realised that...[insert blindingly obvious observation here]" In this case, what do you think would be the "blindingly obvious observation" that would have prevented Hitler's rise to power?
My own opinion, with limited in-depth knowledge of European history to draw on!, is to say the Versaille Treaty was designed not to stabilise Europe, and Germany particularly, but to extract a national and petty form of revenge by the nominal victors. It was a modern form of parading the captors through the streets in chains, raping and pillaging, and putting their cities to the torch. Hardly applicable to an industrialised era and location, and it was thus hardly surprising Hitler had a strong basis to build ultra-nationalism. The rest followed...