The problem is, of course, as I mentioned over on the "Sex as a Weapon" thread, the issue is not only whether what is being aborted is human, alive, or even a person. Trayvon Martin was undoubtedly a person, genetically human, and (at least until his body was perforated by bullets), alive. And yet not so very long ago the man who ended his life was deemed blameless for the act. So our society has determined that under some circumstances, the termination of the life of a live, human person is not a crime.
The problem arises because a large segment of society believes that it is. At its basis, this seems to be a legal issue, but inasmuch as the law echoes the prevalent moral feeling of society, and morality is often informed by religion, and religion often tied in with emotion, a seemingly clear-cut issue of murder vs justifiable homicide is muddied beyond easy comprehension.
My suggestion is to refrain from muddying it further by claiming that the human fetus you displayed in the opening post is anything but human. As soon as the cellular structure is capable of metabolism and response to stimuli, it is biologically speaking, alive. The fetus you showed is clearly dead, but it was once alive.
Let all sides concede that abortion (and indeed, miscarriage) results in the death of a living human being, and we will be able to proceed on a much more level negotiating table.