In response to those saying there's no 'purpose or plot resolution', that's the point-this was one giant metaphor for how civil wars start and 'finish'. This is evident by the last interaction, when one says the ira and free Irish with stop soon because there was pause, and Colin's character responds that it won't end and that's a good thing.
This was the writer's attempt to depict civil wars as pointless beginnings that escalate to the point of useless bloodshed, and that escalated into perpetuity until there's nothing left to kill or destroy.
I still think there could have been a more succinct and deliberate ending, but his sister leaving and both men having nothing (even less than what they started) with no resolution or even addressing the original problem was the whole point of the metaphor. At the end of civil wars, no great resolve happens, no one is left with more than they started with, and all that's left is a melancholy spirit and despair.
This was the writer's attempt to depict civil wars as pointless beginnings that escalate to the point of useless bloodshed, and that escalated into perpetuity until there's nothing left to kill or destroy.
I still think there could have been a more succinct and deliberate ending, but his sister leaving and both men having nothing (even less than what they started) with no resolution or even addressing the original problem was the whole point of the metaphor. At the end of civil wars, no great resolve happens, no one is left with more than they started with, and all that's left is a melancholy spirit and despair.