What right? The right to travel, the right to work, the right to walk down the street, while simultaneously humming a tune and chewing bubble gum - any right.
Including those rights the foreign country denies to its own citizens such as the right to free speech, to trial by jury, freedom of religion, avoiding self incrimination etc?
By extending your argument to include all rights it becomes fairly clear that the fairness standard you advocate is suspect, and would require us in some cases to treat foreigners by standards we would consider inhumane and unconstitutional. It makes a good sound bite, but it is not in all cases, sound policy. For example, how should we treat immigrants to whom we grant political asylum. Further, if an immigrant becomes a legal permanent resident should we still continue to set policy based on how a US citizen would be treated in a like situation in the foreign country. Would you be willing to
loosen up US immigration policy based on what some other country does?
In any event Moatz is simpy following US immigration policy by allowing immigrants (for example, those on H1B visas) to take the patent exam. If the real problem is that people from certain foreign countries shouldn't be able to get H1 status to practice patent law, I think the place to start implementing the policy would be somewhere other than the patent office.