He said he couldn't believe anyone was naïve enough to think the government wasn't monitoring everything already, and that we elected them, so we should trust them. He said that privacy concerns sound pretty trivial compared to preventing incidents like the Boston Marathon bombings or apprehending the suspects, and that he'll gladly cooperate to help stop the bad guys.
We pretty much ruined lunch for everyone with our arguing, but he has since spent more time looking into the nuances of the topic and has said he has changed his mind. The thought of not being able to trust the government is really depressing to him.