Definition of "antihuman"

What more fierce than the scorn and more violent than the abuse poured on the member of a trades-union whose sound moral feeling rebels against the iniquities sanctioned by its collective conscience, albeit that conscience be essentially antisocial, if not antihuman?

1836, Henry Maudsley, Life in Mind & Conduct: Studies of Organic in Human Nature‎, Macmillan and Company, Limited, page 135

I would like this antihuman woman to know that she has played right into the hands of abusers everywhere by making this claim.

1991 April 26, Name withheld, “Our Abusive Critics”, in Chicago Reader‎

I've rarely seen a sculptural object express contradictions so well: they're both human and antihuman, squat and vertical (because of the drapery folds), heavy and light.

1999 February 19, Fred Camper, “Form Follows Dysfunction”, in Chicago Reader‎

The dialectical obverse of this use of opium is the fear that opium will turn humans into nonhumans or antihumans. Wild beasts, addicts, and Orientals are alike feared as antihumans, negations of humans.

2002, Keith McMahon, The Fall of the God of Money, page 190

These witches, the human antihumans, are the most prevalent and present evil in the world.

2011, Magnus Course, Becoming Mapuche: Person and Ritual in Indigenous Chile, page 41