Watching Dutch slowly descend into paranoia and separate himself from Arthur (primarily due to Micah’s manipulation) was a wonderful bit of environmental storytelling. It was a B-plot that was running in the background whenever you return to the gang campsite… But Arthur only really begins to see it after it is too late for him to stop. Because by the time Arthur realizes what is happening, Dutch has already firmly made up his mind about Arthur, and Arthur has already started trying to get out of the life. And Arthur having doubts only serves to cement Dutch’s paranoia.