Final answer:
The central idea of the Holocaust is the systematic persecution and murder of millions of innocent people, primarily Jews, by Nazi Germany and its collaborators. It serves as a tragic reminder of the consequences of hatred, discrimination, and indifference.
Step-by-step explanation:
The central idea of the Holocaust is the systematic persecution and murder of millions of innocent people, primarily Jews, by Nazi Germany and its collaborators. This genocide was a government-organized campaign that aimed to eliminate certain groups based on their religious, ethnic, and political beliefs. The Holocaust serves as a tragic reminder of the consequences of hatred, discrimination, and indifference, and highlights the importance of confronting injustice and preventing future genocides.