The 'implied' inferiority comes from demanding 'special' treatment not given to those who are of a different pigment. solely because of that pigment.

If they are not actually inferior, why is it necessary to put them in the front of the line ahead of  those whose only perceptible difference is skin color?

Like the Asians (of multiple countries and backgrounds) who always seem to do better than the rest of us?  Or the Jewish who always seem to do better than the rest of us?  Or the women who always seem to do better than the males?