I was meaning authoritarian as in the sense of authority being commonly understood as the legitimate power of a person or group over other people. And my argument was that even communist and anarchist societies will use power over other bad actors inside that society if those bad actors pose as threats to the prevailing political system.

If a bad actor seeks the pain and suffering of others, regardless of their mental health, or even if a bad actor seeks to persuade a society's peoples away from the prevailing political principles, such as someone advocating for hierarchy in an anarchist society or a capitalist advocating for private property in a communist society, then those societies will still use their power to self preserve those modes of political power.

To the bad actors, those societies will appear authoritarian.