The dream, in which you were staying at concentration camp, denotes to the fear of disapproval from those around you. The dream may also show the problems you get while receiving other people and their different views. The dream suggests you to get along with the people around you even if they are completely unlike you are. Also try to accept yourself and individualism that lies within you. Sometimes those people, who lived in the concentration camp in their waking life, are having dreams, because of the experience they had.