Reddit mentions of Fatal Purity: Robespierre and the French Revolution

Have you read Fatal Purity? it may address a revolution that came over a century before the Bolsheviks seized power but it tells something that is endemic with revolutions after it.

Now as to your points, Berkman does state that the Bolsheviks believe a state to be necessary in order to fend off "counter-revolutionaries". However, this is where Bakunin, a contemporary of Marx, disagreed with Marx himself. If you would like, we could debate this in its own post so it is not buried deep in a tail of comments.
However, Berkman is giving an account of how things progressed in Russia while he was alive. He and Goldman were in Russia while Lenin was alive and both decided to leave after the Kronstadt Rebellion. What is presented in the four chapters I cited can be thought of as a slimming down of this book.

I hope I have assuaged you from using the phrase "Not a historical fact" about Berkman and his thoughts on the Bolsheviks. Thank you for your time.