Bravery often comes together with stupidity. This is the case.
Right now, at this very moment, the Russian government is probably doing one or even several disgusting things all governments do. Disclosure won't make them stop.
I would agree if we could agree upon what's 'moral' and what's 'immoral'. You're applying your ethics and morality to everyone around you falsely assuming that these things are universally accepted.
That word again. What if I told you that this corrupt and invalid state saves millions of lives every day by its mere existance? It may be corrupt and invalid, but it herds 300 million idiots trying very hard to keep them relatively safe and well-fed. Discrupting this state won't make people happy. I saw the fall of USSR. There was no happiness.
That only proves that since 1945 there was no original thought in Western Europe. Everyone thought what's moral and what's not in accordance to what the media had been telling them. To throw your life away by not shooting an idiot who decided to jump a fence - great choice!
State is a form of formalized monopoly for violence. How can it be unopressive?
Actually, I think that Snowden didn't cover a tenth part of what's really going on. I'm afraid that he simply had no access to the most disgusting secrets of the US. Fortunately.