[Tycho]

Armenian genocide seems like a similar phenomenon, although interestingly not very far removed from Nazi Germany in time and space. So while it might show that such things could happen 'elsewhere' it doesn't really prove that they could happen 'anywhere.'

The example of the NKVD seems a totally different matter. The wikipedia article describes it as a top secret operation. And obviously against a backdrop of numerous other political murders by the same regime.

[ajuc]

Killing all people of one nationality by state. Seems the same for me.