there is a scene between Michael and Hyman Roth when Michael asks in an accusing manner "Who ordered the hit on Frank Pentangeli? I know I didn't." Roth then goes into a rant about how he never asked any questions about who gave the order to kill Moe Green, because it was business, not personal. Why wouldn't Roth just say "I gave the Rosatos the go ahead after you came to my house and said "Frank Pentangeli is a dead man. What's wrong with you?"
Roth gave him that world-beating speech about Moe Green to divert Michael and make him think that Frankie's assassination was quid pro quo for Michael's whacking of Moe.
