First, how a country treats its citizens is not its "internal business", if the people are treated harsh, it's up to the world community to decide if it should intervene and help them get rid of those who provide such treatment.
Second, what Orwell described was exactly how dictatorial authorities can treat people in their own country. Did he write much about other countries? No. There was only one ministry that was engaged in waging wars - Miniwar, the other 3 - Minitrue, Minilove, and Miniplenty stuck to humiliating their own citizens. In fact, if you're looking for a 1984 prototype, you can go with almost any commie regime, they all fit fine.
And finally, don't you think that common people, like you or those from your environment don't have to be bothered by the things a country may or may not do to some international terrorists? For it can hardly affect you...