There’s no connection between a supposed ideology of communism, and authoritarianism. The “authoritarianism” arose as a result of material circumstances, not ideology.
Material conditions made me put the worker council leaders in front of a firing squad!
No one said this.
Saying that the rise of authoritarianism had nothing to do with ideology is wrong though. Mind you, it wasn’t the result of communist ideology, but the opportunistic Leninist ideology that hijacked the worldwide leftist movement.