Tell me the ending

Okay, you've explained literally what happens on the screen and in dialogue, but that's not enough with this film. You would have to do a lot of work on your own to figure out what really happened, as it's not really all there in the film. I haven't done this, but I can point to a few intriguing moments that I'll try to fill in. For one, why is it so crucial for the detective to get revenge on the pool hall criminal who killed the policeman early in the film? That cop was killed because he was corrupt, and it didn't seem like he was all that close with the protagonist anyway. For another, when his wife asks his girlfriend "What kind of fear is that?" regarding his apprehension to having a child, it seems like an important question, but it's left unanswered. So what kind of fear is that?

The final scene is interesting in that it's a satisfying ending without really making any logical sense at all. Which homicide is the detective under arrest for? The one where he stared into the eyes of a man before that man slit his own throat, or the one where he fled a self-destructing building that buried a mysterious glowing man? He wouldn't be convicted for either, but I'm guessing it's the second one. You are incorrect that he shoots the man, he just points the gun at him before it's knocked out of his hands. I suspect Cohen means to imply that leaving his gun at the scene of the crime incriminates him, but he never makes anything of that.

Okay, so he's arrested for that second homicide. But what would the trial for that crime be like? "Did you or did you not telepathically will the tenement building to self destruct and kill this man?" "Yes, your honor, God told me to." It's nonsense.

And yet, the last shot of him taking responsibility, in a way, for killing the Antichrist figure is strangely satisfying. Here's a man who assumes responsibility for all the sins of a city, both supernatural (series of linked but unmotivated killings) and petty (a dope dealer killing a crooked cop) and he achieves a kind of grace from it. I think Cohen wanted to end the movie with this image, but didn't bother to justify it. It's an effective conclusion: that ironic last line, "God told me to," repeated for emphasis and followed by the confrontational image (breaking the fourth wall) of a man who rights the wrongs of society, accepting his punishment and not asking to be understood. This significance is somewhat palpable in the film, but Cohen doesn't do the real work to get us there. We see the character change from a man who won't reveal himself to his girlfriend, who doesn't want to produce a son with his wife, who is an outcast at his job into a Christ-figure giving himself up for the betterment of the world, but this arc is not really sketched out in a way we could care about.

The film doesn't make sense, but it's not garbage.

Why would anyone waste their time to narrate the ending to the lazy-assed OP, who never returned to this thread? I mean, c'mon!