I mean, if that was the ending, what was the whole point of having him do the whole 'kill list' in the first place? What WAS the significance of the priest thanking Jay before he killed him? What WAS the meaning of what the child pornographer said to him just before HE died? These are questions that are just so bloody annoying because there is really no answer at all - and like you say, that's not because the maker(s) were being sly and smart and 'all the answers are there, you just have to look' - no; it's that they had no fucking idea. Goddamn it.