the hit on Pentangeli was setup by Roth/Rosatto brothers, but because of the misunderstanding, he thought it was Michael. well, he didn't testify against Michael, since they brought Pentangeli's brother to the hearing.

isn't understandable that Pentangeli went against Michael because he thought Michael was the one who tried to murder him?? once it was settled that this was not the case, couldn't they have come to some mutual agreement so Pentangeli didn't have to kill himself???