While there are various groups that contributed to the over all destruction of the Jewish people (Hungarian Police), the German Nazi Party was the group responsible for the Holocaust. Hitler and his leadership of the Nazi Party believed in the Aryan race being chosen to lead their country into the future. He and his followers believed the Jews, Gypsies, Gays and other fringe groups needed to be destroyed and only the White supremacistsshould rule. Even if the camps were not located within the German boarders were still ultimately controlled by the German Army.
"The Nazi "slaughterhouses" and "factories of death" are antithetical to this civilized practice of death; the Final Solution is an absolute mockery of human rights and values. The effect of this madness on persons normally a part of a culture organized around a detailed belief system is a breakdown of their social compact with each other and a fall into melancholia."