Earlier quoted context omitted.
Glenn Greenwald is a Pulitzer prize winning journalist. He broke the Snowden story--another sensational-sounding scoop which likely sounded like total bullshit at first. Is it possible that Mr. Greenwald is a better judge of whether or not there is a story here?
The namesake of the Pulitzer prize, Joseph Pulitzer, was one of the foremost proponents of yellow journalism. Rudy Giuliani, an American hero for a couple of years after 9/11, is now a foreign asset for all intents and purposes. Having prestige doesn't make you infallible, it just means you were in the right place at the right time.
I think that's a fair assessment to make.