How can someone advocate liberty and freedom, when they support the killing of unborn children.
Fiscal conservatism and social liberalism are not compatible.
It may be hard for some conservatives to grasp, but since many pro-choice people do not regard the unborn as human beings, it is entirely logical for them to support policies which destroy them, regardless of their positions on fiscal policies. Likewise, someone who recognizes the humanity of the unborn would oppose policies which would allow or encourage their destruction, again regardless of their fiscal policy positions.
I don't know why you regard pro-abortion advocacy as incompatible with fiscal conservatism; the two views are essentially orthogonal.
For me, though, the real deal-breaker for Rudy is his refusal to acknowledge that his past anti-Second-Amendment actions were grossly unconstitutional. If he were to acknowledge that he'd made some gross mistakes in the past, but was wiser now, and if I judged him to be sincere, I wouldn't hold his actions against him forever. But unless or until he acknowledges that his actions were grossly wrong, I see no reason to forgive them.