The Question and Answer section for The Quiet American is a great resource to ask questions, find answers, and discuss the novel.
I think that themes are more effective than morals. Still, if you need a moral, you might consider that violence is always bad for both a people and their country. Check out the GradeSaver themes page below:
I'm not sure what you are asking here. What "development process" are you referring to?
The novel can seem anti American due to the fact Americans are seen as murderers. For example when a bomb goes off in a crowd of people. The Vietnamese are seen as the victims.