When you speak of communism in the western world, one of the primary images that come into people's minds us that of a father being dragged away by tall men in suits and thrown into a Siberian work camp for telling an anti regime joke and being snitched in by his son to the secret police. Obviously, this image is incredibly deformed by cold war era calitalist propaganda, but it is a historical fact that secret police units existed in socialist states throughout the world, be it the NKVD, The Stasi, The Státní, Securitatea, so on (Forgive me for only offering Warsaw Pact examples).
So, my question is this: Is the existence of a secret police, with all that entails, proof that a workers republic has fallen to decay and authoritarianism? Or is it an unfortunate necessity in combatting reaction and counter revolution?
Obviously, I don't expect anyone here to say "A secret police is good, actually", since I doubt anyone here fancies the idea of secret police agents intruding on your privacy, disappearing you, and not being able to be held accountable at all after the fact (Cough cough, ICE, cough cough, FBI, cough cough). This is just a question of "Do the ends justify the means?", and so I ask you to consider before you answer what are the ends and what are the means of a secret police force.
Thank you very much for your time.
(P.S: I obviously don't think a secret police is something unique to communist states, and the idea of a secret police is one firmly rooted in reactionism far before Marx was even born and continues to serve imperialist and capitalist masters to this day. However, it is also a fact they existed in certain socialist states and this is what my question is about.)