Concensus seems to be that it was posted as a joke and was never put out as a real photo of the event.
On the day of the ‘rally’ I saw the original picture of the small crowd. Then, when this came across it seemed so in keeping with what they did on another rally picture from New Hampshire a while back I accepted it as true. Now I am searching to see what the NH deal was about. I think it was the removal of some signs they didn’t want in the media, or maybe foreign flags.