Please, folks
This board is filled with so much misinformation that it's not worth trying to point it all out. I think a board like this naturally tends to attract a lot of biased, sloppy-minded conspiracy theorists.
And what no one seems to realize/remember is that Oswald's own brother Robert, after visiting Lee in jail shortly before he was killed by Jack Ruby, was, based on what Lee said to him, absolutely certain that Lee was the assassin. And recent modern forensic reconstructions prove that he was the only gunman.
I'm not going to rebut every harebrained theory or false notion--it's just not worth it. But if folks really want to bother, they can find out the truth with a bit of digging. There's no mystery here. The film tries to show an alternative theory, but it just doesn't fit the facts/evidence. Period.
The universe is not only stranger than we imagine, it is stranger than we can imagine.–J.B. Haldane