And slavary was legal until it was decided it was wrong, and laws passed to that effect.
You STILL fail to deal with the point.
I am sure that slave owners in 1859 were happy with the law as it stood, and did NOT want discussion of whether their slaves were "fully " human.
I fail to see how one can object to the war in Iraq on the basis that people are being killed for what our elected leaders feel is the benefit of th US and the world while declaring that the convenience of the mother outweighs the life of the ( to MANY) human fetus.