Treachery can be forgiven. However, it need not be forgiven. One can simply choose not to act in response to treachery. Michael made a choice to act in response to it. He didn't have to respond other than he did by excluding Fredo from his crime family.
"Generosity. That was my first mistake." "Experience must be our only guide; reason may mislead us." "Instagram is Twitter for people who can't read."
