If all Biffs are white, but not all whites are Biffs, does it make sense to lump the non-Biff whites in Biff's race, for purposes of stereotype/bias analysis?

If all Biffs are white, but not all whites are Biffs, does it make sense to lump the non-Biff whites in Biff's race, for purposes of stereotype/bias analysis? Maybe "white" is too vague.