Indeed, "below the natural state of a man." In a certain way, its sufferers refuse to be men, if by being a man we mean being in the image of God. That image is the only thing that separates us from the beasts of the field.
I suppose Tiller was a beast. There is no question in my mind (based on his public statements) that he suffered from this pneumopathological disease that Plato called nosos (I'd describe this as a collapse of the self for loss of the divine pull), and Cicero aspernatio rationalis ("contempt for reason.") It is especially clear that Tiller was a person who "call[s] evil good, and good evil; that put[s] darkness for light, and light for darkness; that put[s] bitter for sweet, and sweet for bitter!"
Indeed, he seemed to be on a one-man Crusade to invert the entire moral order of Western civilization. The devaluation of Life and Truth and Justice was this Crusader's main weapon. His victims were not restricted to just the babies he killed. He was attempting to victimize society itself by undermining its moral core.
The opportunity did not go unseized. A sidewalk counselor repeatedly told abortionist Tiller that God was concerned about the babies he murders through abortion. She also expressed that God was concerned about Tiller's soul. Other counselors urged Tiller to repent for the "shedding of innocent blood," and to beg Jesus to forgive his murderous sins.
With Tiller arriving at the front gate to his property, a counselor finished her plea, "You can't go to heaven unrepentant, George; you are going to hell." The abortionist George Tiller instantly quipped, "Abortion is worth going to hell for."