Nationalists don't really care about the rights and freedoms of other people. They are only concerned about the rights and freedoms of their own country.
I saw an interesting quote several years ago, I can't quite remember where but I think it was from a slashdot or usenet signature line. It has bounced around in my head for years, first because its obvious absurdity an non sequitur nature baffled me and offended me to my core... but recently because it has started to make more and more sense.
So is the entire concept of espionage!
The entire purpose of espionage is to convince people in other countries to break their oaths and tell you their secrets.
If this guy doesn't like the morally gray or dark areas of intelligence, why did he spend 7 years in the industry?