Nigeria 'offended' by sci-fi film

I have to preface my own reaction to this film with my own "where I'm coming from:"
I have seen Blood Diamond, Cry The Beloved Country, Tsotsi, Nowhere in Africa.
I like to hear music from all around the world, including music from Africa. So I have knowledge of the beautiful music from all "corners" of the continent.
I loved HBOs series"No. 1 Ladies Detective Agency," filmed in Africa.
Basically, if I see a movie about Africa, or a documentary, I see it to understand more about African people.
District 9 taught me more about filmmakers and film producers and scriptwriters more than it did about South Africans or about human nature in general.

DIstrict 9 would have so much better if it had been a good ensemble cast story,(Like the Alien movies, like the Star Trek TV shows or movies.) i.e. it has more than one main character. Sadly, that wasn't the case. No African in the movie was given any good roles, no depth of character.

The movie lacks balance. If a movie shows racist characters or situations, it should also show non-racist characters. With a better ensemble cast/story that could have happened. I understand that not all films have to be ensemble based, but most classic sci-fi movies, and classic movies in general, actually usually are. (Think of even Peter Jackson's films: Braindead(Dead Alive), LotRs, King Kong)

Also, I can understand Nigeria being upset. How did Nigerians get to a South African slum? It makes no sense storywise on many levels. Why does it even matter where those gangs are from? But why would Nigerians be in a South African slum for Aliens????
Regarding balance: then have a Nigerian police officer who is more in a hero role in the movie.
I wouldn't be surprised if it got mixed reviews in South Africa, too.

All of this was in the hands of the director, the scriptwriter, the producers, a whole team of people who went over everything concerning the movie day in and day out probably for months. They decided the movie would be what it ended up being. They decided on the characters, the story and the cast. They edited the script, the story, and the final version of the film.
It does show that sci-fi can take place anywhere on the Planet. It wasn't the best South African film out there, and while it has a solid sci-fi story, even that story could have been told better. I think it could have been and should have been a better movie. It missed lots of opportunities, especially to give Africans screen time in good roles.
In comparison to other sci-fi movies and classics, Disctrict 9 has many flaws.

Interesting fact from wikipedia:
The cinema of Nigeria is a nascent film industry in Nigeria, growing up within the last two decades to become the second largest film industry on the planet, in terms of number of films produced per year. This is ahead of the United States and behind the Indian film industries. [1] According to Hala Gorani and Jeff Koinange formerly of CNN, Nigeria has a US$250 million movie industry, churning out some 200 videos for the home video market every month.[2][3]