Original sentence: Biographers of Stalin point out that he believed the British rejected his proposal of an anti-fascist alliance because they were plotting with Nazi Germany against the Soviet Union, and that the western democracies were expecting the Third Reich to attack "Communist Russia" and were hoping that the Nazi forces would wipe out the Soviet Union — or that both countries would fight each other to the point of exhaustion and then collapse
Edited sentence: Pro-Soviet biographers of Stalin point out that he believed the British rejected his proposal of an anti-fascist alliance because they were plotting with Nazi Germany against the Soviet Union, and that the western democracies were expecting the Third Reich to attack "Communist Russia" and were hoping that the Nazi forces would wipe out the Soviet Union — or that both countries would fight each other to the point of exhaustion and then collapse