The genocide no one talks about.
Prussia was once a powerful kingdom along the Baltic Sea -land currently controlled by Poland, Lithuania and Russia (Kaliningrad enclave).
Under Bismark, it united the German states/principalities/etc into a single empire.
It’s people, the Prussians, we must assume, were a distinct ethnic Baltic people existing for thousands of years.
Their language at the time of their disappearance was a dialect of German, as the region was conquered by the Teutonic Knights in the Middle Ages.
They were wiped off the map post-WWII by the Allies: Soviet Union, United States and Great Britain.
Many fled into Germany proper and were subsumed into it. Millions were abducted by the Soviet Army and shipped off to various parts of the Soviet Union (especially central Asia). Hundreds of thousands (if not millions) of others were murdered by the Allies (especially the Red Army).
Again, though these people spoke German, it would be fair to assume that they were, predominantly, an ethnic Baltic people whose original language was side-lined via Germanification.
But even if that were not the case, and they were of Germanic origin (similar to the English), they would still constitute a unique and particular people as their culture and identity, fashioned over nearly a thousand years, was distinct from other Germanic peoples (similar to the English) -even Hitler spoke disparagingly of the Prussians, due to their distinct and particular social and cultural customs and ways (an stoic, aristocratic culture that would not permit a commoner like him to rise to a position of power, among other things).
So here we have an actual, total, genocide of a people, taking place within the past 75 years, and there is nary a word spoken of it. Even the name of the people and the land has been wiped off contemporary maps and appears nowhere.
Complete, and total, genocide.
And it was carried out by.........The Allies!
Yes, the victors of WW II, who defeated Nazi Germany, actually succeeded in doing what they accused Germany of attempting.
Maybe that's why we don't talk about it.