This speculative attribution seems a bit fishy to me. This attack is a clumsy way to harass those projects. It's not sure to work, and is bringing the specific

This speculative attribution seems a bit fishy to me. This attack is a clumsy way to harass those projects. It's not sure to work, and is bringing the specific projects more attention in the meantime. As an official (or easily-attributable) extra-territorial action, it seems both unprecedented and disproportionate. It's also drawing extra attention to the border machines and their capability to do man-in-the-middle tampering. I'd have thought CNGov would want to be miserly with that capability, to suppress awareness of the risk or development of countermeasures/workarounds. I wouldn't completely rule out that this might be an action by some other party that intends, in a roundabout way, to raise an alarm about Chinese net borders.