January 30, 1933 was the day that began the unfortunate demise of the Jewish populations of Germany and the rest of Europe. The 30th of January in 1933 was the day that Adolf Hitler was named Chancellor of Germany. That fateful day was the day when he started to consolidate his power and start pushing forward his anti-Semitic agenda. Over the next 5 years, the Third Reich gradually enforced anti-Jewish laws, the most infamous being the yellow star worn on the sleeve. Today marks the 72nd anniversary of Kristallnacht, also known as "The Night of Broken Glass."
Kristallnacht occurred during a two-day period and was encouraged by Hitler's Nazi regime. Jewish businesses and synagogues were vandalized and looted. Also, about 91 Jews were killed. This event was the first time in Nazi Germany that the killing of Jews was condoned. The aftermath of Kristallnacht paved the way for Hitler to institute his Final Solution and the Holocaust.
Source of information: http://www.ushmm.org/museum/exhibit/focus/kristallnacht/