It is now clear that Snowden was not focused on unearthing for public debate only selected matters that raise issues of privacy and that ought to be debated. He instead was, like his contemporary Bradley Manning, engaged in wholesale compromising of any secrets he could get his hands (or his keyboard) on, consequences be damned. He was conducting an unrestricted attack on U.S. government information security. Perhaps he and Manning exhibit a naïve belief that secrecy is not necessary for conducting programs of foreign policy and national security. But traitors are not all sophisticated; some are naïve.

--Paul Pillar on Edward Snowden. And here is an alternative quote of the day from the same piece:

It is well past time to discard the notion that Snowden wasn't doing something terribly wrong because he was not working all along, in classic spy-novel fashion, as an agent of a foreign government. For one thing, foreign governments (and terrorist groups) read U.S. newspapers. For another, when Snowden went to Moscow he put himself at the mercy of the Russian government. When he was given permission to stay in Russia, it could be assumed that anything he had on whatever laptop or thumb drive he had with him came into the possession of the Russian intelligence services. Given his earlier stop in Hong Kong, when he also was looking for help in where to go, probably something similar happened with the Chinese. In short, Snowden's actions entailed bushels of U.S. secrets being given to Russia and China. There are various terms that can be applied to that, but it certainly isn't “whistle-blowing.”

I suppose that it is worth noting that the last two paragraphs of Pillar's piece are really good too.