Can you show me any ethnic group that dominated another and treated the others well? It's very rare.

Spanish enslaved Native Americans.

White Americans treated blacks as subhuman slaves.

The imperial Japanese considered other groups genetically inferior and treated them like animals.

African tribes enslaved other African tribes and sold them to Europeans.

The Turks tried to eliminate Armenians.

Belgium slaughtered Africans in the Congo by the millions.

Chinese place Uyghurs in "re-education" torture camps, and secretly murder no one knows how many.

And on and on. So humans are all carrying around this thing called sin, and we need a savior.