Due to the extent of mil intelligence docs stolen, and since the domestic programs deployed were lawful at the time, whistleblower is a disingenuious title for Mr. Snowden. Putting aside domestic disclosures, it's difficult to see how the scope of stolen materials merits praise or euphemistic titles. Snowden is a fugitive. As it pertains to the majority of what was stolen, he is not a whistleblower, but a thief. Had…
Assuming for the moment that this is true...
Even something that is secretly lawful can be entirely immoral and only doable if kept hidden from the public who would otherwise object. The whistleblower's responsibility is to the public, not just their organizational superiors.
It's unhealthy to believe that the law dictates ethics.