There are several vital differences between totalitarianism and all the orthodoxies of the past, either in Europe or in the East. The most important is that the orthodoxies of the past did not change, or at least did not change rapidly. In medieval Europe the Church dictated what you should believe, but at least it allowed you to retain the same beliefs from birth to death. It did not tell you to believe one thing on Monday and another on Tuesday. And the same is more or less true of any orthodox Christian, Hindu, Buddhist or Muslim today. In a sense his thoughts are circumscribed, but he passed his whole life within the same framework of thought. His emotions are not tampered with.
Now, with totalitarianism, exactly the opposite is true. The peculiarity of the totalitarian state is that though it controls thought, it does not fix it. It sets up unquestionable dogmas, and it alters them from day to day. It needs the dogmas, because it needs absolute obedience from its subjects, but cannot avoid the changes, which are dictated by the needs of power politics. It declared itself infallible, and at the same time it attacks the very concept of objective truth.
George Orwell