No, that is not. You are making the same mistake that "because I work for someone evil it means I must be evil too." You are assuming every single person who have or is currently working for NSA must be evil. Just because someone accepts that having a job is important than public good at some point does not make them less untrustworthy. You can have someone who donates to good causes all the time, does a lot of community work and yet when he quits his job because he is sick of NSA or because he just want a better job and now he can't because he was with NSA.
This assumption is wrong; you are equating government to its workers. If so, should anit-war people look at our American soldiers evil too? Because people are following orders?
If I work for a Mafia boss, you know, take care of his house so that he can be comfortable and safe at home, am I supporting to the cause? If a German citizen was supplying raw materials to Nazi is that citizen a Nazi and evil when he was just making a living for his family while he absolutely hate Hitler and Nazi?