So, there are Catholics who believe that they can be pro-choice to kill babies by abortion?
The earliest known Christian writing outside of Scripture is the Didache (Teaching of the Twelve). Lets see what the early Christians wrote:
The Teaching of the Twelve Apostles
(1st Century AD)
The Lord's Teaching to the Heathen by the Twelve Apostles:
1 There are two ways, one of life and one of death; and between the two ways there is a great difference.
2 Now, this is the way of life:…
The second commandment of the Teaching: "Do not murder; do not commit adultery"; do not corrupt boys; do not fornicate; "do not steal"; do not practice magic; do not go in for sorcery; do not murder a child by abortion or kill a newborn infant. "Do not covet your neighbor's property; do not commit perjury; do not bear false witness"; do not slander; do not bear grudges. Do not be double-minded or double-tongued, for a double tongue is "a deadly snare." Your words shall not be dishonest or hollow, but substantiated by action. Do not be greedy or extortionate or hypocritical or malicious or arrogant. Do not plot against your neighbor. Do not hate anybody; but reprove some, pray for others, and still others love more than your own life.
Statements of the Magisterium on Life