I'm not angry, I'm not an angry person, but I do sometimes like playing with the perception of anger, as in pretending that I'm more angry than I actually am, and sometimes it works quite well.
The President is of opinion that if Japan makes a treaty with the United States, all other foreign countries will make the same kind of a treaty, and Japan will be safe thereafter.
The humor is essentially dark for a cartoon and sophisticated. But at the same time, being a cartoon gives the writers more freedom than in a normal sitcom. It always pushes the line that, despite human failings, the Simpsons are really decent people.