"Night"

When reading "Night" I think that it is about Jews that are being kidnapped to be put to work by Hitler, because when Mrs. Schachters said, “’Jews, look!’” and “’From the moment on you are under the authority of the German Army….If anyone goes missing, you will all be shot, like dogs.’” Before reading "Night" my understanding of the Holocaust was that all Jews were sent right to a concentration camp and killed in the gas chambers. They weren’t?