Yes they are human.
The argument for moderation is a mistake. If by moderation you mean compromise allowing abortion under certain conditions. Yes there should be civility. But there can be no moderation in this debate anymore they we can be moderate if we debate killing sick or disabled people. The reason being that compromise will always be based on a personal belief about abortion. When one person says we should allow abortion in some instances he may mean in cases of rape or incest. Another amy mean the mother has a history of post partum depression. Another may mean when the family is poor. All of the arguments for abortion are therefore subjective arguments. It places the burden on the fetus to show why it should be allowed to live. Its life is subject to the beliefs, wants and needs of another human being. It goes without saying that a fetus can not defend itself or offer an argument for its continued existence.
But we can. The only way to frame the argument for life and the defense of the unborn is not by subjective experience or anticipated experience. But by objective standards based on religion, science, woman's worth, natural law and society's duty to protect the sick, weak, poor and helpless. These things are solid, they do not change based on a person's whim or fancy.
If the value of any person's life can rightly be subject to another we have no valid argument against slavery, embryonic stem cells, cloning, euthanasia, child labor, child abuse, rape, and murder. Let alone abortion.
Abortion clinics are the contemporary altars of Moloch. Just as worship of Moloch brought down God's judgement on Canaan we can not avoid our day of judgement for tolerating abortion. That is why we must not compromise in our defense of the unborn. We do not need to engage in extreme slash and burn tactics but we must hold fast to declaring that yes unborn children are human. They are persons and worthy of the laws protection.
I sincerely hope I didn't somehow come across as arguing for moderation. If so, then I screwed up somewhere.
In a media age where Katie Couric had a colonoscopy live on TV and channels are devoted to grotesque plastic surgery techniques, just about the only medical procedure that is banned from display is a live fetal ultrasound. If every child that undergoes 'sex education' in school would be exposed to a film of fetal ultrasonography, the debate would be over regarding the humanity of a fetus.
It is advocacy groups like Planned Parenthood and NARAL who have kept this one bit of education totally off limits.