Who cares about deniability or skepticism in an apocalyptic scenario as described? Do you really think cool heads would prevail if China was put in a such a situation? Chaos, and desperate people would be the result, with a nuclear arsenal in the mix. And they would, most likely, blame whoever they want, proofs and rationality be damned.

Keep in mind, I don't deny that the military can find uses for what the article describes. But, to go from this, to deliberately provoking WW3 by massively launching such a weapon on China is suicide. It would provoke a counter-attack, guaranteed, no matter the political arguments.

Plausible deniability is fine when the targeted countries can't counter-attack, or the matter is relatively minor. But, directly against China and with world-ending repercussions? No way.