Lyric discussion by Jhurtado 

Cover art for Cutting Off the Blood to Ten lyrics by Right Away, Great Captain!

you are right it is about his hatred for his brother and wife and he is talking about commiting suicide. he is also saying that he wishes the lord would give up on him because if you commit suicide you are damned to hell. and tying the rope around his wrist is to drown himself by tying himself to an anchor.

this song is written from his father's perspective. he cannot believe that his other son has been sleeping with his sons wife but hes also distraught that he cant stop it or be the one to tell his other son about it.

Well I don't think that he's telling the Lord to give up on him because he wants to commit suicide, hoping that if He does give up on him, he'll have a safe passage to Heaven. He's not trying to find a loop pole into Heaven. Also, committing suicide doesn't damn you to Hell.