I have to believe that “guilty mind” is an extreme oversimplification of mens rea. Just because an abortionist doesn’t believe they are committing murder or at very least homicide, doesn’t make them any less guilty of the charge. Of course the law considers abortion differently than that, but if the law were changed and a state decided that their law on abortion was that it was manslaughter, then there should be no escape from that fact. Ignorance of the law is not a defense.
I would argue that the abortionist is fully aware that they killing a human being with every abortion. However, the law says it is not homicide, and they make a lot of money doing it. There is every reason to believe that those who gravitate towards abortion as a vocation are true psychopaths, who do not have the innate capability of empathy that most people are born with. They simply do not care that they are killing human infants. Some even get pleasure out of the act.