Bro just cut his brain trying to make a point. Ironic

At first, he was still able to play his music. It's only After Padraic kept trying to be friends that he cut everything.

And while I agree it's a representation of the civil war in Ireland, I believe it's a good story on its own.

Well sorry to break the news to you but you didn't understand the context of the movie. It's okay though, not everyone can relate to having a close relationship with someone.

In this context, its not. Imagine your best friend doesnt want to talk to you anymore even though nothing happened. You won't believe him, so you'll try to get an explanation. The explanation doesn't make sense to you, and then he cuts his fingers, which prevents him from doing the only thing he enjoys doing. Now, you understand he was 100% serious about it. Remember, this is early 20th century, you can't block someone on social media.

It was not silly at all. Actually a good representation of people living isolated from the city back in the days

I don't think it was odd at all. Colm knows Padraic wont believe their friendship is over unless he does something brutal. But Padraic is like a child and won't let Colm go. The pain of losing his sister and his donkey ended their friendship for good.