one man's traitor isn't another man's hero, human life isn't a fairy tale or a movie. Almost any grown man with principles is going to look at snowden as a weirdo and just be like, thanks for helping me win, thanks for the heads up, now get the fuk away from me before you backstab somebody else over your personal feelings.
Nothing gets changed by bytching from the outside, especially the government or a big institution. That works if you got ketchup on your burger and you didn't want it, you can bytch and probably get another hamburger, to change how the NSA does it's work will not happen by bytching from the outside. If he really cared deeply about changing the institution of the Nation Security Agency and influencing people to take a different path on surveillance he would have kept at it and worked himself into a position of influence possibly even a top position running the show in maybe 20-30 years. People on the left are going about it all backwards, while they are yelling on the street the dude on the right keeping his mouth shut waiting for that opportunity to be able to change things his way, people on the right have patience and an actual solid goal that the left doesn't have.