The term concentration camps referse to any camps where you rounded up a bunch of all people belonging to some group with no due process, and typically including whole families (this is what distinguishes them from prison). By this definition they are concentration camps, as are the camps used by the US when they rounded up the Japanese americans and several other instances going back to the 1800's.
However in the eyes of most people concentration camp refers to the extermination camps where the Nazis systematically kill everyone who was brought into them. I think most people feel that it is important to distinguish between camps that lock people up without recourse, and camps and kill people. That is why we aren't referring to them as concentration camps. If you call them concentration camps people expect that means systematic mass murder, when they realize that is not what is happening you loose credibility and those people end up ignoring the real human rights crisis.
To be more precise under today's usage concentration camps include both the extermination camps, and internment camps. Internment camps is a more precise definition of what this is.
Also I think unfortunately while that while their is wide expression of the belief that extermination camps are immoral and should not happen. I don't think there nearly the same expression around internment camps.
However in the eyes of most people concentration camp refers to the extermination camps where the Nazis systematically kill everyone who was brought into them. I think most people feel that it is important to distinguish between camps that lock people up without recourse, and camps and kill people. That is why we aren't referring to them as concentration camps. If you call them concentration camps people expect that means systematic mass murder, when they realize that is not what is happening you loose credibility and those people end up ignoring the real human rights crisis.
To be more precise under today's usage concentration camps include both the extermination camps, and internment camps. Internment camps is a more precise definition of what this is.
Also I think unfortunately while that while their is wide expression of the belief that extermination camps are immoral and should not happen. I don't think there nearly the same expression around internment camps.