It seems to me, Roth took a very risky unnecessary gamble that Roth's “Havana deal†carrot would make Michael to go against his own people
Certainly Roth took a risk with that ploy. The risk, as I posted earlier, was that Michael would question the obvious: Why is Roth interesting himself in this obscure beef between Pentangeli and the Rosatos? But, he was counting on Michael's greed for the Havana deal to blind his eyes to the obvious. And, Roth was right, wasn't he? Michael ignored the obvious until the Tahoe machine-gunning nearly cost him and his wife their lives.
