Despite the other reviews, I found the acting excellent, the plot engrossing, and the outcome sad but entirely appropriate. That said, I also believe that Lee Harvey Oswald spoke truthfully when, just before he too was assassinated he said, "I'm just a patsy."
Although not necessarily disagreeing with the movie's suggestion of who the people actually responsible really were, I tend to find what Joel Belz has written more likely.
If that's so, this country is in deep, deep trouble. Why? Because topmost-level American governmental secrecy continues to grow, and when evidence of deception appears, Congress doesn't seem to care.