Yes, I know the title may sound like a vague attempt at a bloodthirsty revanchist fantasy. But I am merely curious, what sort of POD post-WW1 would be needed for the German people to (ironically) have a genocide waged against them?
For reasons as to not stretch the realms of plausiblity, this hypothetical German Genocide doesn't necessarily aim at exterminating ethnic Germans as a whole. Perhaps an extremely brutal ethnic cleansing programme, but not an outright annihilation.
So, what has to happen after 1918 for the Germans to become victims of genocide?