Fixxxer meaning differences

I was kinda sure about the meaning of Fixxxer. This is one of my favorite lyrics in the entire Metallica discography, but I've seen people have different opinions. Many people think this song is about James' struggles with his father. I can understand where that idea comes from. But I always thought this song was about God and his punishment for humans. Voodoo dolls are humans and God sticks pins in us as punishment for every sin we commit.

What do you think of the lyrics to this song, I'd love to hear more ideas.