

I don’t see at what point exactly that person is doing “apologia” for the nazis. I am also not aware of any evidence suggesting that the polish people killed in Katyn were “nazi collaborators” as you are trying to claim and it seems like what you’re trying to do is thoughtless apologia for a real atrocity commited by the USSR on polish people. Yes, killing 20k people is nowhere near as bad as the nazi atrocities - that doesn’t suddenly make it justifiable.
I can’t really respond to the NYT article you posted, it requires a subscription to view
When it comes to the Goebbels diaries, it appears that Goebbels himself knew (or at the very least believed) that Katyn was done by the Bolsheviks. Although the massacre was very useful to him for propaganda purposes. At least that is the impression I get by skimming through his 1943 diary (published sometime in the 90s)
On April 14, 1943 he wrote
Evidence of Soviet guilt was provided in the 90s - Beria’s letter to Stalin comes to mind. Recent investigations into the mass graves done by polish archeologists showed that the victims didn’t have anything made after 1940 on them.
No, the “people repeating this version of the story” are not just a handful of western propagandists and nationalists. This story is accepted by everyone except for a few MLs.