The above was discussed further in Vito and Fredo

Poor Fredo
Greene angrily jerked his arm away from Fredo just before Fredo's “Wait a minute, Moe -- Moe, I got an idea”
Then Fredo taking sides against the family
Quote
Tom -- Tom, you're the Consiglieri and you can talk to the Don -- you can explain...[explain what?!]

Tom quickly shutting Fredo down
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Just a minute now -- the Don is semi-retired and Mike is in charge of the Family business now. If you have anything to say, say it to Michael
Greene storms out