Persuading religious fundamentalists that their core ideology is fundamentally flawed by reasoned argument is about as likely of persuading Richard Dawkins and other New Atheists that their core ideology - their certainty about the nature of the universe - is similarly flawed.
Let's try, however. Questions about metaphysical notions, I'm afraid, cannot be addressed by the scientific method. Let's contemplate the simulation hypothesis, the notion that we live in a perfect virtual world running on some computational substrate 'somewhere else'. As it is a perfect simulation, no scientific test can reveal it to be a simulation, correct? Hence we cannot rule out a not-so-supernatural entity having built this simulation and turned it on (we could call that the Big Bang moment if we like). This philosophical notion can be extended to any religion on the planet, any fantasy story. All we can say to be logically consistent is that no one religion is any more supportable than another, from this viewpoint.
So, have we convinced the New Atheists to recant? I doubt it.
Now, as far as the abortion issue, to be diplomatic in these affairs we must seek common ground, and ignore the grinding of teeth and shouting on all sides. We should be able to agree that if the only time a woman became pregnant was by her deliberate choice to do so with the planned intention of raising a child, and there were no negative outcomes, like severe developmental defects that risked the life of the mother, then it would simply not be an issue, would it?
That's about as far as common ground goes, however. Personally I think the religious right are grotesque hypocrites as they refuse to back rational public health policy, quality childhood education for all, social support networks for children and mothers, or environmental policies that reduce exposure to teratogenic substances. They seem like blinkered religious fanatics and the notion that such people are susceptible to rational discussion is frankly ridiculous. These are the types of people who, if they had nuclear weapons, would likely set them off to achieve their fantasy of Armageddon and the Second Coming. The religious organizations they adhere to run brainwashing and mind control programs that target children, as a means of enforcing political and social control, and they've been at it for thousands of years. That's my view anyway.