https://home.treasury.gov/policy-issues/financial-sanctions/...> Can U.S. persons do business with entities in North Korea?
> No. Unless authorized pursuant to a general or specific license from OFAC and/or BIS, Executive Order (E.O.) 13722 prohibits new investment in North Korea by a U.S. person and the exportation or reexportation, from the United States, or by a U.S. person, of any goods, services, or technology to North Korea. E.O. 13810 (“Imposing Additional Sanctions with Respect to North Korea”) does not modify any of those prohibitions.
It's quite clear a) that national origin is a protected class and b) that a) does not mean it's illegal to target a nation-state.