Did you read the article? It explains how this guy ended up linked to the Trump campaign. No one disputes that he had a role of some sort as a foreign policy “adviser.” The guy was clearly desperate to be some kind of big shot, but he was a incompetent neophyte.
Oh I read it; it was a comedy of errors. You had a guy with no foreign affairs background staffing the foreign affairs advisory group. It's no surprise that Papadopoulos slipped through. It's unfortunate that he slipped through, somehow got on Trumps radar screen, and was prominently listed by him as one of his foreign policy experts. A lot of time Trump is not well-served by the people he surrounds himself with.