I think this (if not an April Fool's joke) is a really worrying glimpse into the Russian government's psyche.
As a bad-taste exercise it can hardly get worse, can it? I'll leave it to your imagination what the subject of an equivalent park in Germany might offer for the entertainment of the youth in whom they are trying to inculcate the hatreds and emnities of the past. How is this any different?
It certainly doesn't bode well for hopes of any rapprochement between E and W, does it? Quite the opposite in fact, this is clearly intended to actively develop anti western hatred. Just more proof of the Thug in the Kremlin's crusade to turn Russia into a dangerous global bully again.
Shame, shame on Russia.