The movie is set in Lebanon, and based on real Lebanese problems. However, the setting could be in another country, another time, with two other groups that hate each other. It is about the universal problem of wrath and resentment boiling over.
The movie is well done, with some unnecessary dramatic flourishes - the story is dramatic enough in itself and didn't need these additional items (Don't wish to say what exactly in order not to have any spoilers).
In any case it deserves its Oscar nomination.
Review of The Insult
