Why were they put in concentration camps what have they done wrong?

Answer 1

The reason why people were put into concentration camps was so that the Third Reich could free Germany by concentrating "subhumans" into these facilities. These people who were classified as "subhumans" were Poles, prisoners of war, political criminals, homosexuals, dissabled people, slavs, gypsies, and more over Jews.

How people were put into the camps was usually by means of freight trains. The SS officers would force 80 to 100 people into a car that was so small, you could only stand. People usually died on these transports from dehydration, hunger, lack of light and oxygen, and diseases from feces. Another kind of transportation was a series of death marches; when the SS officers would force the people to run all the way to the destination. If anyone slowed down or stopped for a moment, they were usually shot on the spot.

So they could keep the inmates inside the concentration camps, the SS guards would line the perimeter of the camps with a barbed wire fence (usually it was electrofied) and they put up watch towers so if they saw somebody try to escape, they would shoot them (although there were successful escapes during the Holocaust.)

Answer 2

most people from concentration camps were Jews. They didn't do anything wrong, they had to go to concentration camps because Hitler and the SS didn't like them and thought they weren't people so they kept them in concentration camps for a while to torture them and then they chose random individuals and shot them or gassed them. Some people however, weren't Jews. they were gypsies and stuff like that. here were even some Catholics because they sometimes helped hide Jews in their houses/sheds/garages etc so they wouldn't get sent to concentration clamps or killed but instead they were the ones that were killed because they helped Jews ( the Jews were killed with them )

It is important to distinguish between the death camps(Auschwitz, et al) and the concentration camps (Birkenau, et al). The death camps (which were established starting about 1941) were solely intended to kill those sent to them, and usually did so within hours of arrival. The death camps were the penultimate part of the Nazi's Final Solution, and, as such, people were shipped there almost exclusively based on racial consideration - that is, because they were Jewish, Gypsy, Polish, etc.

The concentration camps, however, were effectively part of the German prison system, albeit a horrible part. They were established starting in the mid-1930s. Concentration camps were intended to hold those considered "enemies of the state", for whatever infraction the Nazi courts deemed anti-state. In many cases, this simply was failure to follow Nazi demands (e.g. to turn over certain birth records) or to speak out against Nazi policies. The camps were also filled with common criminals and "undesirables", which included folks like German Bolsheviks (those Germans who had some association with Leftist or Communist organizations), Jehovah's Witnesses (whose pacifist beliefs were judged to undermine the warlike stance of the Nazi's), and even a portion of Allied POWs. Essentially, concentration camps were extremely abusive prisons (where prisoners were so maltreated that thousands died) intended to hold anyone that the Nazi regime didn't like, for whatever reason - they were a convenient place for the Nazis to keep "troublemakers" out of the way so that there would be no one to challenge the Nazi's power.