From NetFlix:

After Robert Ford (Casey Affleck, in an Oscar-nominated role)
joins the most notorious gang in the West, he grows tired
of the charismatic Jesse James (Brad Pitt) and begins to
resent his fame. But by hatching a scheme to gun down James,
Ford risks forever being branded a coward. Sam Shepard, Sam
Rockwell, Mary-Louise Parker and Michael Parks also star in
director Andrew Dominik’s riveting Wild West drama adapted
from Ron Hansen’s acclaimed novel

Why do Americans glorify crimnals ? The acting in this film is superb, especially Casey Affleck. Brad Pitt made it clear that Jesse James was a psychopathic killer. In fact, from the movie I gathered that Jesse James had such mental problems that in the end he was glad to be shot. This movie is no more violent than any western. The pace is very S L O W . But I was on the edge of my seat because I expected something horrible from Jesse James at any minute. It lasts 159 minutes.