Because abortion isn’t murder.
The discussion of what constitute's murder and what doesn't is actually pretty interesting in itself. Certainly whatever principle we come to can be applied to both abortion and other forms of killing.
On the one hand, Archivist seems pretty adamant that the term murder is wholly determined and defined by the governing laws under which one lives. As a Christian, I personally find this position problematic, and I wonder if a distinction is necessary.
I find this problematic because Scripture speaks to the immorality of killing innocent human beings. I don't think Scripture is subjective in what it teaches. I think God is immutable in His Character, and if killing a human being is wrong in one instance, it would be wrong in the same instance even if secular law said otherwise.
Thus, I think for a Christian, Archivist's position that abortion is
not murder
because secular law says it isn't is problematic if we're looking at the discussion from the framework of Christianity.
This is easy to demonstrate. We all agree that if I killed my neighbor because he allowed his dog to poop in my yard, that this would be immoral and wrong. But let's say that one day a year the secular government lifted all killing laws. Thus, for a 24 hour period it would
not be illegal to kill my neighbor, no matter my reasoning. If we followed Archivist's principle, then it would not be murder for me to kill my neighbor on this day. My question though, is -
Would God agree? I don't think so.
If God would agree that what ultimately constitutes as murder is defined by secular law, then morality is reduced to subjectively, ever changing laws written by fallen, fallible men.
I don't know of any credible theologian or Christian who has ever prescribed to such a notion.
Pro-Abortion advocates like Archivist often like to cite that abortion isn't murder. But that's misleading, and for us Christians, we see through it and get it.
Abortion may be legal, but at the very least, for the 98.5% of abortions committed for convenience reasons - the act is immoral, and I think Biblically speaking, certainly is a form of murder.