I'm curious why you think that.Imho, the grandfather should be hung.
Do you think hanging him would prevent other people from doing the same thing?
Or is would it strictly be a punishment?
Do you think he's not already suffering? That he isn't going to suffer with the knowledge that he killed his grandson for the rest of his life?
And isn't that worse than dying?
What would be the value of hanging him? What purpose would that serve?
This incident makes me furious too. I'm just trying to understand why you think hanging him would be a good thing.