Sierra Leone has a great discussion about Blood Diamond… one of the very best I’ve seen!
If what the movie portrays is negative it’s because the truth was negative. The truth must not be hidden. The movie specifically clarifies that this is in the past and that there is now peace in Sierra Leone. Banning the movie would be censorship, and if you want to project a positive you are welcome to make more movies about the new more peaceful Sierra Leone, that is “freedom”.