I don't think he would be considered a terrorist because he wasn't advocating or practicing violence. He was just sitting back and allowing society to crumble for lack of having him. Now Ragnar on the other hand, was certainly a terrorist (and a hero).
Galt might be accused by association, but who knows. Now as for being a traitor, he would probably be considered that because the people around him would have felt that he had betrayed them - whether that belief is rational or not.
If it was politically expedient, no doubt his adversaries would use the rhetoric to try to manipulate the population into not listening to him. It's all just a game.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.