So I expect the atheist and humanist to be pro-abortion. I am surprised when they are not. I, on the other hand, would expect the humanist, at least, to be pro-life. The way to change their mind would be to convince them that abortion hurts themselves, not, necessarily that it hurts the baby (whether we feel that way or not, or whether they consider it to be a baby or not.)
What philosophical chain of thought could possibly lead a humanist to believe that an unborn baby has a gretaer right to live than he/she has to convenience? If they are evolutionists, their is really no reason to expect it. They must be inconsistent to do it.