I believe the author is more implying the morality of such restrictions, not their legality. It seems to me in the vein of the argument of MLK's argument of jus

I believe the author is more implying the morality of such restrictions, not their legality. It seems to me in the vein of the argument of MLK's argument of just vs unjust laws From "Letter from Birmingham Jail": > An unjust law is a code that a majority inflicts on a minority that is not binding on itself. This is difference made legal. On the other hand a just law is a code that a majority compels a minority to follow that it is willing to follow itself. This is sameness made legal. Let me give another explanation. An unjust law is a code inflicted upon a minority which that minority had no part in enacting or creating because they did not have the unhampered right to vote.