In my view: The ruthless shooters sprayed Michael's bedroom with machine gun fire, but Michael knew he was the target--if Kay had been hit, she would have been "collateral damage." So, as Pete said, by removing himself from Tahoe, Michael removed the target. His family would be safe, at least temporarily.

He showed courage in going to Havana with only Buscetta at his side. But Michael had an overarching need: to find out who was the traitor in his family. Roth was hot for the $2 million, and as long as Michael could keep stringing him along, he could buy time to identify the traitor. Michael also had the advantage of knowing when, where and how Roth would strike, while Roth still believed Michael was clueless about Tahoe.

A question presents itself: If Roth was so hot for the $2 million, why did he try to have Michael whacked at Tahoe, before he could get his hands on the money? IMO: Roth, too, had an overarching need--to get rid of Michael. Tahoe was Plan A because he wasn't there and Pentangeli would make a perfect fall-guy for the hit. When Plan A failed, Roth went to Plan B: have Michael whacked in Havana. Michael's visit probably was arranged in advance, as Oli said, as a way for Roth to string Michael along on the Havana "deal." But, the $2 million was for Roth to pay Cuban President Batista to have his thugs assassinate Michael. Nice touch: get Michael to pay for his own demise!