Perhaps. But as someone who is not a Stalinist, I would rather see people lose their job over how the Last Jedi destroyed a good movie franchise than over some idiotic tweets someone made. Lots of dumb college kids might say stupid Marxist stuff online before they grow out of it. And even if they dont, as long as they do a good job at their work, I think they should be allowed to have dumb opinions without having their career destroyed.
What we call Orwellian revisionist history is really Stalinist revisionist history.
George Orwell wrote 1984 and Animal Farm about the Western European Stalinists who absolutely refused to recognize the horrible things Stalin had done to his people.
Whether the director is a practicing Marxist is beside the point. He uses the tactics of the Stalinists. Destroy all evidence and admit nothink.