The biggest problem is that while most americans certainly don't want a police state gestapo society, they are complacent because they don't believe it is really happening because the NWO/american government has been careful to create media diversions as the slow and gradual changes are made. They are pleased that they can create these false flag operations and botch them up so badly, but somehow still pull it off. Most americans buy it all hook line and sinker every time. They don't question anything. The only ones who see through it all are the ones who use street smarts as a filter for any information that pertains to government.
If these NSA activities were within legal scope, as you say, then Snowden is trying to wake US citizens up out of the lull they are in. Hey america, look what is legal - look what your complacency has allowed!
They do not need to have a police state in order to not be derelict. We have a ready and able and powerful military. If what they were doing was so effective and anything more than what it is, they would be able to stop things like the boson bombing. If they focus their attention away from their war with it's own citizens, that is.