Please help me. I am about to go crazy. In GFII, when the younger Vito is sitting on the stairs after killing Fanucci, there is a man playing the guitar and singing a song. i know its the main theme, but what is the actual name of the song with the lyrics. Please help me. thanx

What have I ever done to make you treat me so disrespectfully? Had
you come to me in friendship, then this scum that ruined your daughter would be suffering this very day. And that by chance if an honest man such as yourself should make enemies, then they would become my enemies. And then they would fear you.