Explanation to ending: I’ve heard too much about Messianic overtones to think it’s just time travel- how the hell does frank the bunnie go back in time with him to talk to him- why does he talk to him- why burn down the positive thinking guy’s house-what the hell is the point?
Discussed at length here.
Most of the stuff is up the the view to formulate their own opinion, there is no right answer. He burned down the positive thinking guys house because frank wanted everyone to see who he really was a pedophile