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.
Maybe. But maybe not. Stranger things have happened in history, and they really have. I'm going to go out on a limb here with some wildly uninformed speculation, but the people running the show in the PRC aren't normies. They are people that have clawed their way to the top of a ruthless pyramid of power. Or were raised from birth by people who clawed their way to the top. Either way, they're at the top for a reason. Look at China's communist history, and you'll see a fairly consistent, running theme of systemic paranoia -- sometimes thinly-veiled, sometimes outright -- that occasionally spirals into non-trivial political purges. History is full of examples of plot twists even more bizarre-sounding than this, and I am far less certain than you are that the perceived perpetrator(s) of such a targeted depopulation event would be so clear cut to the Politburo.
All that aside and more importantly, after one really bad crop failure, the PRC will have more existential problems on its plate than who gets the blame.
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.