Nice local detail; Hatfield/McCoy feud; perplexing questions
I liked the fact that the film was rich in local detail. For example, when Dwight is outside a bar in the countryside that has a lot of pickup trucks parked in front, he breaks into one. I thought that he would steal the truck, but no, he steals a gun that is in the truck. In other words, he knew that in that part of the country in that type of location and in that type of vehicle, people would keep guns. The story seems to be in some respects a contemporary version of the Hatfield/McCoy feud that occurred in that general part of the country in the 19th century.
I do have a couple of questions, though. What does the title "Blue Ruin" come from and mean? I don't get it. Also, I'm confused as to the exact relationship between the guy who gets out of jail after 20 years and is killed by Dwight and the father of the enemy clan who died in 1999. Why did Dwight kill that guy? The 20 years in prison creates a real timeline problem for understanding the story. I would really appreciate some clarification on this point.