TB, they're all sharks who employ any strategy that will get them what they want. Michael's interaction with Ola was simply a ploy to disguise his real intentions; there was no other productive reason for Michael to have said or done anything else to Ola. His statement to Frankie was intended to keep Frankie from doing anything rash that would antagonize Roth and upset Michael's plan.

So, yes, he didn't trust Roth before the shooting anymore than he trusted anybody else. His statement to Tom about our people being businessmen and their loyalty being based on that is revealing. If that was true of his own family's soldiers, was it any less true of a Jewish gangster.