Here, the verse signifies: Supposing that your claims be true, (WHICH ARE NOT) what then? Is it right to claim a monopoly for God's message. which must be the same for all people and all ages? On the other hand, Whether you admit or not, the renewal of the Message and the birth of a new nation and new LAW and ordinance, now shines brigthly in the life sky of mankind and no rejector is able to put the light off.