Treblinka, built to implement the "Final Solution," was a death camp. There was a railroad siding, facilities to undress the victims and process ( = steal) their belongs, gas chambers, and crematoria. The only barracks (besides those for the SS guards) were for the few Jews who were kept alive briefly to help run the place. The only "work" that was done there was related to killing people.
Dachau was a prison, albeit a very nasty, awful, evil prison. Treblinka was a factory for turning human beings into ashes.
This highlights something which I often comment on and which has disturbed me for decades. When I was in High School, I had teachers who taught about Marxism. Some of them liked it, some didn't -- but they wanted young people to know about Communism. Same thing in College (I have a BA in History), although there, I think all the teachers liked Communism.
But Fascism? Nazi political theory?? Sssshhhhhhhhh. It's a secret. We don't talk about Fascism. No one is supposed to know what it looks like. You're not supposed to be able to recognize it. We just don't teach that stuff.
The difference between Concentration Camp (very bad) and Death Camp (worse) falls along the same lines. Our society has done a poor job of educating people about the details of what the Nazis did and how they thought. A lot of people believe they have seen photographs from "death camps" of jubilant Jews welcoming the Allied liberators. Nope. Concentration camps, sure. Death camps? Much less so, because most of the people didn't survive.
I look at America is 2011 and I truly believe that the reason we don't talk about Fascism is because we are a fascist society and we are embarrassed and don't want the people to recognize the truth. True, we have neither death camps nor concentration camps, but there's a lot more to fascism than just that. We say "crony capitalism" but we might just as well say "fascist economics".