hold on someone was distributing stuff at work was told by HR to stop doing it and then kept putting up flyers and using work resources for political stuff and got fired?
Ratified international treaties are the supreme law of the land in the US, and the whistleblower protection stuff being invoked is claimed to be from retaliation to a crime allegation.
However, the articles phrasing is employee used work resources to notify colleges that their work may causing legal risk for the business. Which uh seems pretty fine?
But also, the laws of a country Trump whatever policies your company has.