Under the General Government of occupied Poland in 1940 , the Nazis divided the population into different groups , each with different rights , food rations , allowed housing strips in the cities , public transportation , etc . In an effort to split Polish identity they attempted to establish ethnic divisions of Kashubians and Gorals ( Goralenvolk ) , based on these groups ' alleged " Germanic component . " During the 1930s and 1940s , Jews in Nazi-controlled states were made to wear yellow ribbons or stars of David , and were , along with Romas ( Gypsies ) , discriminated against by the racial laws . Jewish doctors were not allowed to treat Aryan patients nor were Jewish professors permitted to teach Aryan pupils . In addition , Jews were not allowed to use any public transportation , besides the ferry , and were able to shop only from 3 – 5 pm in Jewish stores . After '' Kristallnacht '' ( " The Night of Broken Glass " ) , the Jews were fined 1,000,000 marks for damages done by the Nazi troops and SS members
Kristallnacht
Kristallnacht
Racial segregation