We all have a tendency to over generalize our individual experiences. After I've published something, I'll meet someone who says, "I'm Haitian, and I don't know this, so it must not be true." Even if we're talking about a work of fiction. I've gotten very angry myself reading many things about Haiti. We're not a monolithic group; no group is. Also, it's important to keep in mind the genre in which we are writing. Fiction is full of invented stories about exceptional people in exceptional situations. Those situations are not always cheery or celebratory.