Kaertor hit the nail on the head.
1 & 2 are irrelevant. Completely.
You either allow people to have the freedom to have an abortion, or you don't.
You either legislate morality, or you don't.
We as a society will likely not come to a overall accepted conclusion in our lifetime.
Therefore, you make a choice to either allow freedom, or not allow it.
Jesus didn't go around stopping people from making choices that sent them to hell. He educated them, talked to them, and blah blah. But he left the choice up to the individual. Same for God and Free Will.
And that right there is where the religious pro-life movement loses any sort of logical basis for their argument.
Leaving us with the question of protecting life. Until we as a society define a universal standard of life, we should have a choice.