We're discussing the account of Stalin and collective leadership vs top down and not the validity of this document. Good try on moving the goal post.
Also It's not good evidence, but a valueable piece of a larger puzzle, where one understands the dynamics of political economy and has to piece it together through these. If you'd read any theory at all, you know history is always written by the dominant class and one has to read through the lines with documents like this.
Sounds like you take the western account of history for granted, and don't engage with different views. It sounds like youre taking Information by diametrically opposed forces at face value. I too would like topics like feminism explained by anti-feminists, anarchism by an anti-anarchist, Marxism by a lib etc. I definitely never engage with what the other side says