If anything Michael was jealous of the bond between Tom and Vito. Michael was outraged when he learned that Tom and Vito had talked behind his back about his future, and he sat idly by after telling Tom he was not a wartime consigliere, and Vito contradicted him by saying that Tom was not a bad consigliere but that Sonny was a bad Don, and then sort of apologized for Michael's firing him by saying I have full faith in Michael as I do in you....