Final answer:
The event marking the escalation of antisemitism in Nazi Germany to violence is Kristallnacht, which occurred on November 9-10, 1938, resulting in widespread violence against Jews, the destructions of synagogues, and the first mass incarcerations of Jewish people.
Step-by-step explanation:
The Night of Broken Glass (Kristallnacht)
The escalation of antisemitism in Nazi Germany from discrimination to outright violence is most notably marked by the events of Kristallnacht, or the Night of Broken Glass, which occurred on November 9-10, 1938. This event was triggered by the assassination of a German diplomat by a Polish Jew, which led to a brutal spree of violence incited by Nazi propaganda. Joseph Goebbels, the German Propaganda Minister, used the incident to fuel a calculated and widespread attack on Jewish people, businesses, and synagogues throughout Germany and the annexed territories of Austria and the Sudetenland.
During Kristallnacht, mobs killed 96 Jews and injured hundreds, over 1,000 synagogues were destroyed, and several thousand Jewish-owned businesses were looted. An estimated 30,000 Jewish men were arrested and sent to concentration camps. This pogrom was misunderstood by the international community as improbable in a civilized society like Germany, which led to no substantive foreign intervention or significant aid for Jewish refugees. The event foreshadowed the more comprehensive and horrific events of the Holocaust that unfolded over the subsequent years.