It seems to me that Tom may have had a soft spot for Fredo--Michael uses Tom to contact Fredo after Havana, Tom tells Michael that "Fredo says he knows nothing, and I believe him." I also think that, with Sonny dead and Michael freezing Tom out, Tom might have bonded with Fredo as his "brother"---even as a fellow "outcast" from Michael.

Do you think Tom would have tried to stop Michael from having Fredo killed if he'd known that Michael had set it up with Neri to happen after Mama died? Or, would Tom have figured out that Michael would never have given Fredo a pass--and that he'd just have to accept it?