When you write these lines you automatically lose all credibility. From the Article you posted : "Whistleblowers have large egos by nature, and there is no crime or shame in that. But one gasps at the megalomania and delusion in Snowden’s statements, and one can’t help but wonder if he is a dupe, a tool, or simply astonishingly naïve."
I'm not sure those points are true. They seem a little manufactured to benefit a point of view - but then, they would be facts from someone who is offering an opinion (a fair opinion he must think) that is stated above.