The article says it can house 3,000 people. Looking at the map it is clear that it is much bigger than Auschwitz, which by my estimate could house 12,000 if you packed people like rats (which they did). At that population level, to kill 6 million people you would have to cycle the camps population 500 times, or about 10 times a month. Yet there were people there who claim to have lived there for years, when they shouldn't have lasted half a week at the cycle rate needed to achieve their claim. Remember, they initially said that it was 6 million at Auschwitz alone.