"The D'Souza movie is a rehash of an earlier article and book by D'Souza."
Now if also you said that "The Gore movie was also a rehash of an earlier article and book by Gore." you might have some credibility!
The advertising for 2016 makes no secret of the fact that is is based on D'Souza's previous works. It uses it as a selling point.
Personally, I think Obama's anti-colonialism is one of his minor flaws.