Each country X can decide its own laws, and if the baby is
a citizen of country X (or something else than a citizen; for example a country could give you certain rights that are less than citizenship) according to the laws of country X, then the baby has those rights.
Can we conclude that if the person or
citizen of country X is identifiable (real name and surname on Facebook for instance), then the country X can directly prosecute person for this post.
Not exact matches
But I think one
of the things that scientists and other people concerned about science education in the
country need to do is make it clear to publishers that as
citizens and voters, wherever they live, whatever state or town that they live [in], they will make sure that their elected officials know that textbook
X, Y or Z is not to be used in this district because
of its bad science.
In this case, I would ask quite simply whether there is an international law rule that allows
country X to prevent
citizens of countries Y and Z from entering its territory.
Let's change the victim to a fellow US
citizen, and change the murder location to
country X instead
of...
Let's change the victim to a fellow US
citizen, and change the murder location to
country X instead
of Antarctica.
No
country X can make a law that says the baby is not
citizen of country Y - well, they can make that kind
of law, but
country Y wouldn't care.