Not at all defending his actions, but I am reminded of someone in an earlier thread predicting that there may be some political reasons for this to come out, and that we may see NVIDIA do favors for the US government some time soon. That doesn't seem to be the case, but an observation:

"I love our country and our company. I am committed to protecting NVIDIA and supporting America’s national security. I am proud and grateful to be an American." sounds like the exact words one would say if one expects to be threatened of being un-patriotic and therefore cancelled in the right-wing sense. In fact it sounds like something you would hear on South Park, it's a bit ridiculous. As others have pointed out in here, affair or not, the spy label is very much up to US government opinion.