I don't think there is a lot of support in favor of Snowden in USA, don't be confused by internet activism. The reality is most people is US doesn't care about snowden or the implications of his revelations.
In the current US, anti-government activism is a foreign concept. You won't find a lack of people complaining about the government, but you won't find them on the street and make some noise untill there is some real change.
Even the occupy movement was largely a farce and it wasn't really against the government.