Final answer:
The Nazis did not reveal their true intentions on any specific holy day; the escalation of their anti-Jewish policies occurred over time. However, a significant event was Kristallnacht (the Night of Broken Glass) on November 9-10, 1938, which marked a clear escalation in Nazi aggression towards Jews.
Step-by-step explanation:
The student asked about the holy day on which the Nazis revealed their true identity. While the question implies a specific event on a religious day, the full extent of the Nazi's plan for the Jews unfolded over time rather than on a single holy day.
During Kristallnacht, the Nazis carried out a massive, coordinated attack on Jewish people and their properties throughout Germany and annexed territories, which represented a shift from repression to open aggression and violence. This event is often considered a critical point in the lead-up to the Holocaust, marking a severe escalation in the Nazi campaign against the Jews.
The other events listed in the student's options, such as the implementation of the Nuremberg Laws in 1935 and the forced emigration of Jews, also gradually revealed the Nazis' intentions and laid the groundwork for the horrors that would follow.