The movie industry is one of the very powerful tools for shaping the public opinion in the US. This obviously includes TV series ("24" is an example for not-so-subtle manipulative material).
People conveniently forget that Russia was his transit country after he left Hong Kong and planned to arrive in another country (presumably Cuba or Venezuela), but it was the United States government that didn't cancel his passport when he was in Hong Kong, didn't cancel his passport when he arrived at his destination country, but cancelled his passport right at the point when he arrived in Russian airport transit zone but before his transfer flight departed.
[1] http://bigstory.ap.org/article/ap-source-nsa-leaker-snowdens...
[2] http://www.theguardian.com/world/2013/jul/02/ecuador-rafael-...