They aren't pure evil. That is a misnomer. They are a pastiche of what a lot of people thought of the American government, or at least the crazier side of it. You've got secret experiments on people, you've got 'black helicopters' full of faceless enforcers, you've got a batshit crazy president aided by imbecile puppets, you've got chemical weapons and a shoot-on-sight mentality towards deviancy. But they're not evil. They can't be. There are plenty of guys and gals in Navarro who actually believe they are doing the right thing. Obviously, you're not gonna just switch sides and join them though. They are still wrong. I like the fact that morality in the first games isn't black and white all the time. And don't anyone dare draw parallels with my arguments and Hitler. That's a sure fire way to start a flame war haha.