Movies, like the TV, tend to give whatever subject matter they are showing a concept of believe-ablity simply because they are put in front of a 'captive ' audience and are somewhat 'bigger than life' in their format.
Most people, or at least it seems in this country anyway, would rather believe what is shown on the 'big screen' rather than taking the time to sit down and do some research and reading on their own on the subject matter just to see what is the real TRUTH of the matter. After all, history, for most, tends to be somewhat boring to say the least. Much better to know who is on top of the latest music charts, who is the head team in some sport, or what is the latest clothes fashion to be wearing, etc.
We Americans, in general, tend to be very, very ignorant of our nation's history, tending to believe the basic crap that is taught to us in the general history books we learned in school or what's presented on the 'big screen,' and for the most part never advancing any further than this. The exception here being historians, history writers, most modelers, or anybody else who has a fancy for things that have happened in the past.
But then again maybe I'm somewhat prejudice in my opinion here, as I tend to find most all the electronic programming on TV or the movies to be somewhat a waste of my time that I could be using to accomplish much more meaningful things in the real world.
Take care, Sgirty