Well, Germany had to be made to do that. We had to remake the nation into one that has changed its dogma from "we were right" to "we were wrong". The fact that the populace accepted it is awesome, actually, but it needed to be done to them.
How would Germans be able to tell other Europeans what they need to do in which way if they didn't have the moral high ground of Vergangenheitsbewältigung?
While this might not be true for a big chunk of the German population (which is truly horrified by and sorry for the harm their nation caused), it is certainly part of the reson this has been successfully accepted.
The idea that Germany was in any way the single country responsible for WWI is absolutely ridiculous.
The revolution in Bavaria would still happened. And still irk right wing. The democracy would still be rejected and Weimar Republic would still be one massive mess.
Hitler did not gained power just because of social issues.
(And also, less importantly, had Germany won the WWI, they had plans to ask other countries for large reparations. It is not like those were something unheard of at that time.)