Because capitalized "Black" is a specific group and identity containing specific immutable physical and mental characteristics distinct from the rest of humanity by which you can identify them instantly, while white is a mere color identifier of which diverse and varied peoples of all nationalities, outlooks, behaviors, and norms exist within.
Because capitalized "Black" is a specific group and identity containing specific immutable physical and mental characteristics distinct from the rest of humanity by which you can identify them instantly, while white is a mere color identifier of which diverse and varied peoples of all nationalities, outlooks, behaviors, and norms exist within.
Or at least, that's what the grammar implies.