I think you're oversimplifying things to make them fit the story. Ethnic groups don't have beliefs; people do, and different people within the same ethnic group have different beliefs. What beliefs do everyone in your ethnic group share about its uniqueness, history and destiny?
Why are you spouting nonsense about people and beliefs? People are arrangements of molecules, and beliefs are an aspect of cognition. You're oversimplifying things to make them fit the story.