Well this was one of of Michael's mistakes. I mean you could say Vito made a mistake too but there was one big difference which was an attempt on Mike's life had already taken place. I know Mike wanted Roth to believe that he believed pantangeli set him up but it actually cause even more traouble for mike. If Mike had let Pantangeli take care of the Rosato's then Pantangeli would have never become a witness as the Senate hearings. Thats why I think that Mike was a good but not great don. He got a few lucky breaks and was able to take advantage