I think this is from the perspective of criminals and gang/mob leaders, who recruit young people into a life of crime and destroy their lives (sucking their blood from them, so to speak). Also I think The Gloaming is a sort of second part, with the "murderers, you're murderers, we are not the same as you" and the "They will suck you down to the other side" referring to those same criminals from WSYB.
I think this is from the perspective of criminals and gang/mob leaders, who recruit young people into a life of crime and destroy their lives (sucking their blood from them, so to speak). Also I think The Gloaming is a sort of second part, with the "murderers, you're murderers, we are not the same as you" and the "They will suck you down to the other side" referring to those same criminals from WSYB.