I had gotten off this crazy train many stops ago, but:
The DG destination did appear in a Russian GRU report, and their source was the Chinese Ministry of State Security (Chinese KGB, basically).
The (somewhat far-fetched) report alleged that the Maersk Alabama Navy SEAL deaths were clean-up of the security team following successful off-load of an item of very high secrecy in the Malives:
The item was stolen, and the last leg of the delivery of the item was MH370.
The report ALLEGES that the US Navy succeeded in recovering the secret item on the plane and also SOME PERSON associated with that item.
And then the plane was flown to Diego Garcia.
I DID NOT ORIGINATE THIS REPORT, WHICH I DOUBT.
So bizarre it has to be true.

Nut-job Conspiracy Theory Ping!
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One has to wonder, if one believes this, (BTW I do not it’s just too bizarre), what about the passengers? Where are they? What has or will be done with them? They can’t suddenly reappear. Putting that many people in protected custody or new identity programs would be risky. Who is not going to want contact with parents, spouses, siblings, children? The only solutions would be unthinkable, lifetime imprisonment or death. Howwill they keep people in the know from talking? No, this is just too out there to be believed.