Ah, I see.
Despite your calls for the document to be tested against known documents of the right time and place, you are dogmatically convinced that it’s a hoax.
You call for supporting documents. However - typical lefty tactic - you inoculate your position against the truth by insisting that any supporting evidence that the ‘hoaxer’ DOES turn up will just be proof of his/her incompetence, in not bribing someone sooner.
So any new data that turns up will confirm you in your delusion.
Your position is intellectually dishonest: please snap out of it. Joint the rest of us, who remain ready to be convinced of the truth whatever it might be.