Concentration camps were established in Germany in order to kill Jews and for the purpose of mass murder of them.
Explanation:
World War I was the most detrimental period for the Germans because they were made to bear huge restitution charges which shook the economic stability of Germany.
Nazism became prominent and Hitler constructed many ghettos and concentration camps in which Jews that were of European origin were enslaved in those camps and they were taken to extermination camps for mass slaughter. Germans hatred towards Europe resulted in Holocaust and Hitler was determined to wipe out the whole clan of Jews as he believed blindly that they were the most inhuman race in the world.
Many innocent Jews were slayed and those who got survived were filled with fear to live in Germany and hence they migrated and took refuge in the borders of neighboring countries.