In his 1995 book, Rethinking Life and Death , Singer argues that we should discard Biblically-based ethical mandates with newer secular ethics. Singer also argues that newborn humans are not yet persons and that infanticide is therefore possible. Parents should be allowed to kill their handicapped or inconvenient children after birth. The connection is related to our theology of baptism. In infant baptism we express our solidarity with the youngest of humans.
Abortion denies that a child is fully human.
In fact, every argument for abortion is an argument against infant baptism. To the extent that that there is argument about abortion among Christians, it is an argument over baptism. Again Dr. Scaer makes a connection, this time between abortion and baptism vividly in his recent book. Deprived of the birth below, they are deprived of the sacrament of birth from above. The abortion holocaust prompts us to make the Sign of the Cross a more prominent feature of our worship.