More than 30000 Russians were tortured there by polish authorities.
This persistant troll or shill can't even get the communist lies straight.
How does one justify Katyń? Not easy, but one must try, so they invent "crimes." From your own link, troll:
The issue was finally settled in 2004, where a joint team of Polish and Russian historians (prof. Waldemar Rezmer and prof. Zbigniew Karpus from Nicolaus Copernicus University in Toruń and prof. Gennady Matveyev from Moscow State University), after reexamining documents from Polish and Russian archives published their results (printed in Russia by Federal Agency for Russian Archives). Their findings show that the number of Russian POWs can be estimated at between 80,000 and 85,000, and that the number of deaths in the camps can be estimated from 16,000 (Karpus, Rezmer) to 20,000 (Matveyev).
In communist times, not so long ago, you couldn't even discuss Katyń, but the communists provided a substitute: Chatyń. This you could talk about.
A memorial complex commemorating the victims of the annihilation of the entire village of Chatyn (Khatyn), northeast of Mensk, during the German occupation of Belarus. In March 1943, Chatyn's 26 houses with their inhabitants (149 people, including 75 children) were burned by a German battalion. The vast memorial, spreading over 50 hectares, was opened in 1969 and became a major visiting place for local and foreign tourists and delegations.
This kind of thing continues in some communist circles and thus you get threads like this. Commmunists in Russia still agrue that the Germans are responsible for Katyń. They will invent something else soon.