That's what I'm interested in, after being told that human rights are fact (objective).
We have an entire thread dedicated to that topic.
Why do humans have rights? That is a good question. Rights are given not earned.
They are earned, but not through hard work. They are earned by your mental capacity, and they are taken away when you lose that mental capacity or you demonstrate that you never had it.
Rights are defined and enforced by the society we live in.
Not defined (see signature). Rights exist independent of society.
In a civilized society, we have seen the need to protect those who can not protect themselves so we fight for the rights of those that need us to.
We protect human rights not because people cannot protect themselves, but because it is right to protect human rights. The richest man has a right to all of his property, not because he needs that right, but because it is right and just that he have it.
Why give the fetus a right to live? A better question might be, why give the mom a license to kill?
No, that's not a better question and here is why. You don't ask what gives you the right to chop down a tree. You ask why you're NOT allowed the freedom of chopping down the tree. Of all of the living things on the planet earth, very few have any rights at all. Only one species has a right to life. It is the philosophical
default that things do not have rights. You must satisfy the criteria for rights before you have them.
Under the normal course of pregnancy, the human fetus would fully mature and be born.
If by "normal" you mean "uninterrupted by man", no. That is not the correct. Take it from someone who has lost his fair share of unborn.
The natural course is life.
Makes no difference to anything. The natural course is for you to get eaten by a bear. You're defying nature by living in your artificial house and having your artificial weapons.
It is our duty to protect human life especially when that life cannot protect itself.
Yes it is. Why? The answer to that is the reason abortion must be legal.
We are not preserving that life when we take defined measures and action to end that life.
Correct. The problem is that you're casting the net too wide. You're including beings that do not have rights with those that do.
I fail to see how so many people have detached themselves from the humanity of preserving life. It's a pretty big straw when you are talking about life or death.
I assume you're a vegetarian then if you're not willing to kill anything that doesn't have rights.