If the company thinks the journalist isn't working in good faith, are they not then justified in that?
Context is everything. I think there's poor behavior on both sides, but to my eyes it starts with a journalist making unfounded assertions. Would Lumina have gotten upset and threatened over poor press even if it wasn't to the point where someone was making statement of fact that were both wrong and perceived as hurtful to their business? We'll never know, because it appears those statements were made.
We can dumb this down and make it very simple. If someone interviews me, and asks if I beat my wife and I don't answer (for whatever reason. Maybe I perceive it as a joke that doesn't need a response, maybe I don't want to engage with bad-faith questions), and they then print that I'm a wifebeater, should I not be upset enough to threaten to sue initially? Should I assume they're working in good faith, or is that enough to assume bad faith? Personally, I think my choices would be to assume bad faith or that the person is inept and uneducated at the job, and if the person didn't seem stupid, that seems unlikely.