The theme loyalty is present when Eliezer says that he would never do what the rabbi's son did and abandon his father during the run. And the theme of creulty devolves people into a state of savage being is again present when again the Jewish people are herded into cars like cattle and they accept it.
Internment is the imprisonment or confinement of people, commonly in large groups, without trial. The Oxford English Dictionary (1989) gives the meaning as "The action of ‘interning’; confinement within the limits of a country or place". Most modern usage is about individuals, and there is a distinction between internment, which is being confined usually for preventative or political reasons, and imprisonment, which is being closely confined as a punishment for crime.
"Internment" also refers to the practice of neutral countries in time of war in detaining belligerent armed forces and equipment in their territories under the Second Hague Convention.
Early civilizations such as the Assyrians used forced resettlement of populations as a means of controlling territory, but it was not until much later in the late 19th and the 20th centuries that records exist of groups of civilian non-combatants being concentrated into large prison camps.