Second, the problem as you outline it is age-old - what belongs to the state, what to the church, what to the individual. And how does one establish a true relationship with God (or conscience). It's true that abortion is one of those issues that forces us to confront these questions anew.
Third, although there may be higher laws (or not depending on one's religious views) in real life here on earth we can all reach legitimately different conclusions on what they are. I have every reason to believe in your sincerity. I would hope you can feel the same about mine.
I can and I do. With the millions of people here on earth, none could ever reach the same conclusions about all things. The important part to understanding and learning is the ability to listen and reason. Sometimes a discussion may become heated, but understanding, wisdom, and friendships cannot be built without going through the process, nor can friendships be destroyed unless there are personal attacks. It would be a boring world, indeed, if everyone agreed on everything and had one and the same mind. It would be equally boring if one speaks to others who refuse to listen and consider what is said. Then, of course, there's always the "agree to disagree agreeably." That works pretty good, too.