What does "nuclear culture" have to do with this? The author never mentioned it in his essay. In fact, it seems like this essay argues the opposite of nuclear culture (the culture of those involved in developing nuclear weapons). Nuclear weapons are a military secret while NSA spying was a public secret. And the culture that protects nuclear weapon secrets continues to do so because they feel it is ethical to keep those secrets out of the wrong hands, while the culture that protects public secrets will continue to leak them because they violate the public trust.
Edit: Additionally, the government will try to make it look like leaking public secrets is the same as espionage (selling to a government or organization--not leaking) or the leaking of military secrets because it knows that using a strawman argument is the only way it can twist the public perception to make it look like the government is the aggrieved party and not the aggressor.
Edit 2: This also supports the author's point that the government is more angry about the release of public secrets than military secrets. Military espionage (like the stealing of submarine soundproofing technology) can be treated as a crime. But public secrets need a smear campaign and a disproportionate response in order to get the public on their side.