What a great movie
Obligatory 
Great story about revolution that made me think a lot about what's going on in Palestine, with the IRA hitting military targets and the Brits doing violence against civilians as retaliation. It makes sense that the brother who joined the free state was the one who protected the landlord earlier in the film. He's all like "if we don't defend the free state then the British will come back" and it's like motherfucker you swore an oath to the king! You are the fucking British now
It made that a question earlier when Cilian Murphy was about to kill the kid who ratted and he says something like I don't know if I like the Ireland that we're fighting for but then he makes his decision and sticks with it
Banshees of Inishirin was very "what's the point of fighting" in retrospect.