Limits on Roe are not limits on abortion. There are judges that are are "in the same vein" as those judges who might not vote to overturn roe (we don't even know if Roberts and Alito would vote to throw it out, and we can only hope they will vote at least to limit it in some ways).
If Roe was gone tomorrow, you'd still have to fight state-by-state to convince people that abortion was wrong and should be illegal, and Gulliani would be a loud, popular voice saying abortion is OK and we shouldn't mess with it.
If that were to happen as you say, why do you care where Giuliani stands on abortion? He would have no power. It sounds to me like you're saying it doesn't matter if Roe stays or goes.