Drugs, mental instability or possessed. Take your pick. What a sicko! People like that should get the electric chair for maiming an innocent child like that.
If he is so mentally ill that he doesn't know that doing that to a baby is wrong, then maybe he needs to be "fixed" so he can't produce any more babies to injure. Seriously.
Put his butt in prison and they will take care of him. They take it out on child molesters. They are the low step on the ladder.