Between 1933 and 1939, Jews in Germany were subjected to arrest, economic boycott, the loss of civil rights and citizenship, incarceration in concentration camps, random violence, and the state-organized Kristallnacht ("Night of Broken Glass") pogrom. Jews reacted to Nazi persecution in a number of ways. Forcibly segregated from German society, German Jews turned to and expanded their own institutions and social organizations. However, in the face of increasing repression and physical violence, many Jews fled Germany. More Jews might have left Germany had such countries as the United States and Britain been more willing to admit them.
Source: U.S. Holocaust Memorial Museum