The difference is that we're far less subjective than you are here, being we've got the whole history of humanity backing us up on the point that specks haven't ever been considered to be people. You've just got a historically recent bit of religious political correctness.
No, you see unborn children as objects that can be discarded on a whim. And clearly you didn't read the 1948 Geneva Declaration. At that point and time, they considered life to begin from the moment of conception. Apparently you don't do research.
The Oath of Geneva - pro-life
The Rights of the Child and the Changing Image of Childhood
And then there's the Hippocratic Oath, which acknowledges the detriment of Abortion:
"I will neither give a deadly drug to anybody who asked for it, nor will I make a suggestion to this effect. Similarly I will not give to a woman an abortive remedy. In purity and holiness I will guard my life and my art."
"For the first time in our tradition there was a complete separation between killing and curing. Throughout the primitive world, the doctor and the sorcerer tended to be the same person. He with the power to kill had power to cure, including specially the undoing of his own killing activities. He who had the power to cure would necessarily also be able to kill...With the Greeks the distinction was made clear. One profession, the followers of Asclepius, were to be dedicated completely to life under all circumstances, regardless of rank, age or intellect - the life of a slave, the life of the Emperor, the life of a foreign man, the life of a defective child..."
--Anthropologist Margaret Mead
You also may wish to read up on this, too.
Scribonius Largus
As you can see the Romans in 43 CE were not Christians, yet again, you can see they predated Christianity in the Roman Empire by oh...270 years, when Constantine became Emperor of Rome in 313 CE. Even then they had a revulsion to abortion, and clearly acknowledged that the life growing inside the womb.
And then this, Article 4 Paragraph 1 of the 1978 American Convention of Human Rights:
Article 4. Right to Life
1. Every person has the right to have his life respected. This right shall be protected by law and, in general, from the moment of conception. No one shall be arbitrarily deprived of his life."
The Code of Hammurabi (circa 1760 BC) also fined people for causing a miscarriage through assault.
The Code of Assura (circa 1060 BC) imposed the death penalty for women who had an abortion without her husband's consent.
I could go on... but really. Why should I embarrass you any further? Throughout human history, societies placed immense value on the life of an unborn child.
"The history of humanity" does not in fact back you up.