Their response will be that they aren't discriminating on the basis of national origin, just based on the country that issued the ID. They will say that those governments are corrupt or unreliable and therefore the ID's issued by those governments cannot be trusted. It would ovbiously be a lie since there are many more corrupt countries than those listed, and the countries that are listed clearly have been chosen based on the "undesiribility" of the nationals of those countries. But it isn't written that way and that's what they will respond if they respond at all.