Of all the speculative explanations so far, this one would make the best plot for a movie script.
Granted it's being being turned into a narrative but the history is spot on. I wouldn't have bothered putting in sources if I were him either, it's time consuming and those who know the history of the events wouldn't need it.
It's like when HN goes offline. It's an observable fact. Writing what you "think" happened to explain this fact is the speculation part.