As Frankie's brother Vincenzo was already on his way, to enforce omertà knowing about Questadt was not pivotal
How could Vincenzo already be on his way when Michael had just found out that Pentageli was alive?
Sure thing Tom seemingly happy! taking satisfaction from Michael's predicament and acting like —
1. It had nothing to do with Tom
I think that must have
really pissed Michael off:
"You've opened yourself up to five counts of perjury" [emphasis added]. Even if Tom wasn't his brother, he was still his lawyer. Wouldn't Michael have consulted Tom about his testimony, and the risks involved in waiving his Fifth Amendment privilege and lying under oath???