Giuliani is now realizing that working for Trump means he wil never be told the truth by Trump and every time he says something he then has to pivot when further details are revealed.

When Trump was confident Cohen would remain silent Guiliani was telling the world what a great guy he was. Then when turns he talks about how Cohen cannot he trusted. Now when that backfires he has to rely on Trumps tried and tested tactic of telling his supporters not to believe what they hear.