You wrote:
“Only someone that doesn’t consider the unborn a human being — as the Bible clearing does — has to ask why Thou Shall Not Murder applies to abortion.”
The correct answer is that abortion is never mentioned in scripture. Your apparent inability to make that simple point speaks volumes about your preparedness to deal with this issue.
The answer is that it didn't have to be because it was understand there was no difference between killing an unborn child and born person as proven by laws in Exodus 21:22-25:
“If men fight, and hurt a woman with child, so that she gives birth prematurely, yet no harm follows, he shall surely be punished accordingly as the woman’s husband imposes on him; and he shall pay as the judges determine. But if any harm follows, then you shall give life for life, eye for eye, tooth for tooth, hand for hand, foot for foot, burn for burn, wound for wound, stripe for stripe."
And, why are you whining about protestants allegedly being soft on abortion when you trying to deny there is a Biblical prohibition against it?