Answer:
For us to know to not repeat it. because people blindly follow political leaders and that is how the Nazis took power.
The widespread sentiment that influenced the rise of totalitarianism was a fear of instability and the rise of nationalism in countries like Germany and Italy. Authoritarian leaders crystallized the notion that a singular leader, a strong military, limited dissent and nationalism were the ingredients necessary for a strong state. This became a normative framework in Germany and Italy.
The three countries were
Northern and Western Europe and the Great Britain
They are like in the sense that they both speak same or similar languages and both have indigenous tribes. they are different in the sense that they eat different foods and have different indigenous tribes and ethnic groups