You are not Winston. You are not in the Party. You are a prole. The party doesn't give a shit about what you think, do or say. The only exception is if you pose a meaningful threat to the Party. In which case, the Republican-Democrat Party, the Capitalist Party of the United States of America will threaten you, disappear you, etc, etc, just like they have done to every threat in American history.
Fuck if I know. It's a damn long list, and I don't really care if they supported Stalin. You don't send the police names. Here's the list if you wanna look through it https://en.wikipedia.org/wiki/Orwell%27s_list
He gave those names while in a sanitarium for late stage tuberculosis. Don't forget that either. He was pretty out of it by the time the people looking for the list showed up.
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Steinbeck and Chaplin are the only two I recognize. Kind of shitty on his part.