Quoted from Wiki. So Affleck was quite fair la.
Affleck asserted: "Because we say it's based on a true story, rather than this is a true story, we're allowed to take some dramatic license. There's a spirit of truth" and that "the kinds of things that are really important to be true are—for example, the relationship between the U.S. and Canada. The U.S. stood up collectively as a nation and said, 'We like you, we appreciate you, we respect you, and we're in your debt.'... There were folks who didn't want to stick their necks out and the Canadians did. They said, 'We'll risk our diplomatic standing, our lives, by harbouring six Americans because it's the right thing to do.' Because of that, their lives were saved."
