Alexander the Great's own father was considered a barbarian ~ then one day he conquered the Greeks ...... then they all became barbarians until they hustled Alexander and the other Macedonians out of the country to go conquer the world.
You see this mission to civilize humanity is almost eternal ~ there's always a lot of backsliding and they are always figuring out new excuses to murder each other, or torture the young, or whatever other torments they take a mind to explore.
We are lucky that some manage to rise above that in each generation, and we ratchet our way to the great city on the hill that we wish to become.
They don't kill the babies there ~
It is you who is barbaric for wanting to force women to bear the children of their rapists.
If your position is so noble, then surely you can convince her with ease that bearing the child of her rapist is the correct decision to make.
Why are you so opposed to getting her consent?
Why must you force her via law?