Seldom are stereotypes earned. They're the broadest of broad generalizations that often have little basis in reality, and usually they're not exactly flattering. I won't get into any specifics here because we've all heard a few of them on the playground, right?
However, sometimes reality steps in and shows you why a country might have earned a reputation. For example, Canada. We think of it as a nice, polite country — except perhaps during hockey games — but surely there are rude, inconsiderate Canadians out there.
And then they go and do something that makes you really wonder if there are.