"In Chile, there exists a high degree of consensus, that during the military regime, human rights were repeatedly violated with the aim of annihilating the political opposition to the regime as a necessary condition for laying the foundations of a new state whilst making the economic model of this new state a reality." That is the quote from one of they guys on the page you just cited. You know what, he's exactly right. Pinochet wanted to wipe out the marxists, the same bunch that had murdered 100 million people already in the century and were planning the same for Chile. Good for him.
At the end of November 1976, the men and women concentration camp prisoners were transferred to the Tres Alamos camp in Santiago. Then the iron gates opened and they were free to go. Nobody ever provided any explanation as to why they had spent one, two or three years of their lives behind those wire fences."Gee, if they didn't know by then they couldn't have been too bright. I've heard that prison camp gossip spreads like wild fire.
...then the iron gates opened and they were free to go.
Why didn't these folks get exterminated? That's not consistent with a "brutal dictator".