Tom was loyal to a fault. However, he lamented the denouement of the Family as he knew it under Vito. To Tom, under Vito the Family had majesty; under Michael it had been reduced to a gang of thugs. Remember his remark to Frankie: "It once was". Yes, Tom was loyal to a fault.
"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."
