red scares have been a global phenomena, not one isolated to the US. Pointless red baiting in response to what Trump being a fascist is about what I've come to expect from Bernie, the guy who can't call it a genocide.
Declassified CIA documents from the time even say that Stalin was not so much of an autocrat as commonly mythologized.
The only person I've encountered waving Stalin flag at a protest said they were a Maoist when I asked