If govt is doing something illegal, you have a duty to report it.
That’s just it. The government is not doing anything illegal. They’re doing something against the constitution but that would have to be decided by a group of judges who have probably been blackmailed with information the government legally obtained through spying.
Snowden did not disclose anything the government is doing illegally. He just disclosed that they’re doing it.
"We Will Not Lie, Steal Or Cheat, Nor Tolerate Among Us Anyone Who Does"