At first sight, it is a banal childish story, but the most interesting thing is that Donald is too naive to show Peter that he knows everything: Like when the folks went out at night and left you to baby-sit.
Pete leaves Donald there on the side of the interstate, as he wanted. They got into an argument and then Pete left him there on the side of the interstate. Sibling fight all the time, but not like Donald is describing, not to the point where on thinks the other is going to kill them.
Donald tries to help every individual having troubles.
He tried to persuade his brother to stop his sinful way of life. Donald starts talking about the past and refers to this one particular time when Pete was mad that he had to help Donald with everything he needed, because of a surgery. Unfortunately, today, humans cannot understand such individuals as Donald.
I have three brothers myself and trust can be an issue. So - as we talk about the richness of this relationship around the CLTL table, we begin to wonder about the richness of the story itself.
The two brothers are very different in their belief about what is valuable. Pete would never tell Donald such intimate details of his life - but in fact, he does have a repetitive dream.