governments like the Third Reich and Pol Pot's operation might not have been the best for human rights. Power corrupts.
The key issue, IMHO, is the difference between a government of laws that can be discussed and changed if necessary by the population at large, as we have in most modern states, and governments where absolute control is vested in a person or small group who get to make laws by fiat. Powerful kings are like that, especially those appointed by God. Theocratic states are like that as well. The Taliban is an extreme example.