I'm sure the United Nations Assistance Mission in Afghanistan has never threatened to harm anyone in Afghanistan. However inevitably they will be seen as part of a regime established on the back of a foreign occupying army. Nothing fair about that, but fairness doesn't come into these kinds of things.

The consensus of opinion among the official advocates of the war appears to be that the best realistic option for Afghanistan is that significant elements of the "Taliban" forces can be turned and incorporated into a viable regime.

(As for Hafizullah Amin, it's relevant to note that he is believed to have murdered his predecessor, President Tariki, in the course of an extremely bloody coup a few weeks previously. It seems that nobody in power has clean hands in Afghanistan, then or now.)