Race defines a tremendous amount of any nation’s culture. The examples of “racial diversity,” such as later stage Roman Empire, and the Soviet Union, were colossal failures.

If I were any Race but Caucasian, feeling a kindred with my own people would be accepted. Nobody chastises the Chinese for being 95% ethnically Han. Nor Mozambique or Niger. Only Whites in once White nations, are forced to mix.

Your sentiments are actually diametrically opposed to my own, and mine have far more empirical data-points in looking at non-revisionist history.