Why don't you include the US and EU as the possible saboteurs? I mean we have the whole Gulf of Tonkin incident as precedence.
So yeah... us and eu would be my first suspects
https://en.wikipedia.org/wiki/Gulf_of_Tonkin_incident#Second...
Yes, the US administration knowingly misrepresented the facts but in the end the only thing that happened was some US ships firing at shadows in the fog they believed to be enemies. Nothing that had not happened before in far more dramatic fashion: https://en.wikipedia.org/wiki/Dogger_Bank_incident