It is a human but not a person.
And you should be able to kill not-persons according to them.
It is funny/sad when you start asking them where is the line where the human baby becomes a person because you can tell they have put no thought at all into it.
It would be interesting if some conversations about slavery were recorded (written down). I’m sure the rationalizations and double-talk for slavery would sound very similar to the rationalizations for abortion (some people aren’t really human and we can do with them whatever we want, some people are disposable, it supports a profitable industry, etc.).