Something they should have added to the end

I actually thought (at first) that it was Josh's voice at the beginning to the last song. It didn't sound like a Crudup's voice at first.

I think you kind of missed the point in the ending dude. As you said, the movie is about his journey to find catharsis in the situation. The whole movie, he never told anyone that the music was josh's, because he was ashamed, couldnt face it, and was hiding behind that fact. Him getting up at the end, and introducing the song as his sons, showed that he had finally found peace and forgivness for Josh and the situation, and was finally able to move on. Its a more subtle way of showing it, but in my opinion, its a great way of doing so.

Yeah I suppose the ONLY way to move on is through forgiveness.

Still reality is that if I personally were responsible for bringing a life into this world that TOOK the lives of others, I'd likely careen fast into a mental breakdown.
Just being honest. I'd need intense therapy for years on end.

Yeah I totally understand parents are NOT responsible for actions of their kids, I really do. There's only so much in our hands & this is one that is not.

But the FACT is that I'd never rest another moment knowing (and this is the SAD FACT) IF I didn't bring this person to life (as it turns out, murderer)-- MY very act of bringing them into this world-- someone else (or more than just ONE person) would be alive.
Horrible burden.
Unconscionable.
A worse nightmare, I can't begin to imagine!

But the short answer😴 being I would highly doubt I could rise to place of TRUE forgiveness for a murderer. Even tougher knowing it was person I raised, of MY LOINS!
Don't have to lecture me...I know it's right but honestly, one very tall order. I shudder to think of the strife & guilt & questions they must wrestle with daily.
And there would be NO escaping the guilt wondering WHAT I might've mistakenly done wrong to contribute to what went down.
And yes, that is knowing WELL I might have had NOTHING To do with it--I, for one, don't believe that. I sorta think EVERYONE has something "to do" with it (if someone's mentally ill, often the family does NOT want to accept it & get the person the proper treatment, care & also protect society...often they remain in denial, so we must consider that IS sometimes the family of shooters. NO...maybe not most, but still must be acknowledged. AND NO..I am NOT saying anyone should point ANY fingers but just I would go insane if I had to figure ALL that out as a parent & be assigned to live with that until I die)

No, I would not have liked them singing 'together'...the film was a bout Sam, he had no explanation why his son did that, or none that got shared with us. He was in complete shutdown denial mode, and while yes, I can acknowledge that the songs helped him and had value for him, I (as one shocked by the reveal) would have found it highly objectionable of him performing them with others and hiding the truth.

I did not see much self guilt, and I think most parents of criminals are pretty good at self-preservation and NOT looking too closely...

What you suggest would have made it much too romantic. As it is presented, it is Sam admitting the truth, the song was okay, but not the most important part for me at the end.

And I also did not sense a real release, just that, an admitting of the truth, a coming out of hiding, Sam crying for the victims was much more important I thought.

Not knowing, I liked the songs when I first heard them, knowing, I did not want to hear them. Can a killer be a cool songwriter? Should his songs be played? Moral questions I have a hard time answering in the positive...