It didn't feel like it was propaganda at all.
Affleck's statement:
"I tried to make a movie that is absolutely just factual. And that's another reason why I tried to be as true to the story as possible -- because I didn't want it to be used by either side. I didn't want it to be politicized internationally or domestically in a partisan way. I just wanted to tell a story that was about the facts as I understood them. And what that meant was probably two people with different political perspectives would walk away with two different interpretations. Because I find, most times, your interpretation depends on what you went into the situation believing. And I think people will use things. You know, it's like, if people want to misrepresent something, they'll do it anyway. You can't worry about that too much."
And there was nothing in the film that went against that. It kept everything on an even playing board. People can interpret it however they want. I think it's very telling that Affleck himself is liberal with liberal friends. It stayed very by the books and one can bring to it what they want. It was in the end a human story about saving these people from this place to bring them back home.