On April 1, 1933, the Nazis carried out the first nationwide, planned action against Jews: a boycott targeting Jewish businesses and professionals....
On the day of the boycott, Storm Troopers (Sturmabteilung; SA) stood menacingly in front of Jewish-owned department stores and retail establishments, and the offices of professionals such as doctors and lawyers. The Star of David was painted in yellow and black across thousands of doors and windows, with accompanying antisemitic slogans. Signs were posted saying "Don't Buy from Jews" and "The Jews Are Our Misfortune."
Source: US Holocaust Memorial Museum