“...it just got easier to find the perpetrators of Stalin’s purges”
To what end? They’re all almost certainly dead by now.
For historians and history buffs. For truth-seekers. For the children of the victims curious to know the perpetrators.
A great thing that these names are now online.
If we can go after Nazis until they are all dead, then we can go after Communists until they are all dead. And there were plenty of Commie atrocities still going on after 1945, so more of the perps might still be around.