I think the parent is claiming that whistleblower protections don't apply to Snowden. A vigilante's actions can be both morally right and blatantly illegal. There are people that are glad he did what he did, but also believe in the rule of law, and feel his actions might have carried more weight if he turned himself in and accepted the legal repercussions.

Personally, if I were the judge I'd give him a light slap on the wrist because of how hard he worked to bring the information to light in a responsible manner so nobody got hurt. It's hard for me to imagine him not getting absolutely fucked in a real court of law however, and I'm certainly not going to judge him and say, "You should have been willing to throw your whole life away over this, or not done it at all."