What you describe is what hard core Russian Communists called ‘cosmopolitanism''. The accusation of having lived among the ''bourgeois'' and having become ''infected'' with ''bourgeois ideals''.
I think Artur London in his book ‘The Confession’ notes that he was doubly damned being both a Jew and having spent a long time outside the Soviet Block. He even was in France for the entire period 1939 to 1945 and was a member of the Resistance. He also married a French woman. It is amazing he survived. His book is very interesting . Incredibly the film made by the near communist Costa-Garvas in 1970 is true to the book and the most extended cinema treatment of communist interrogation methods and what a ‘purge’ trial really looked like.
I suppose because these were all Czechs involved London didn't have the hell beaten out of him as the Russians were very fond of doing. The Czech methods were less violent but no less sadistic.