The primary purpose of Hitler's concentration camps was to detain and kill Jews, along with other groups deemed undesirable by the Nazi regime, such as Roma, disabled individuals, political dissidents, homosexuals, and others. These camps were part of the broader implementation of the Holocaust, which aimed at the systematic extermination of the Jewish population in Europe.
The other options provided, such as providing a safe haven or educating German Jews in Nazi philosophy, are not accurate and contradict the historical facts regarding the purpose of these camps. Instead, they were sites of immense suffering, forced labor, and mass murder.