Fredo and Tom Extracts:
Originally Posted by Turnbull
Fredo was far more involved with Roth and Ola than he let on

Fredo betrayed his kid brother, Michael for personal gain "something in it for me if I'd help them out" even after
Quote
But don't ever take sides with anyone against the Family again. Ever!

Then continued trying to harm, hurt and injure Michael by still withholding information he knew [even though it made no difference whatsoever to Michael's Senate Hearing defense] was to try and send Michael to Prison because the hit failed and that "something" arguably the Donship, Fredo so coveted, Don Fredo Corleone was not yet gained

There is no redeeming feature

Michael still looking out for his brother's welfare, to get Fredo safely back home [genuine brotherly concern for Fredo's safe passage out of Havana] even after having just learned that Fredo had betrayed Michael, nearly resulting in Michael and Kay being killed.
Oh! What a brother!

Sure thing Michael showed understanding, mercy and forgiveness to Fredo and gave him a pass until Fredo's boathouse outburst cast doubt on Fredo's claim that Fredo didn't know it was gonna be a hit

Did they have to die?
Originally Posted by Lana
Still Michael could have easily continued the same arrangements of keeping Fredo under watch or similar until Mama Corleone's natural death. He had the money and the resources Besides if Mama had lived longer....