Finally a group that's advocating for the pro-choice stance from a spiritual point of view:

My thoughts on this subject: Nothing's more basic to freedom or spirituality than sovereignty over one's own body.  There's certainly no spiritual integrity in telling other people what to do with their bodies or in encouraging an overpopulated world to add a few more people.

Abortion is not tantamount to murder.  Claiming that it is is another way that folks can feel like they're doing something important on a life-or-death level without significant risk--the "pro-life" struggle gives bourgeois, patriotic American Christians a zero-risk cause and a chance to pretend they're doing something as important as abolition or opposing genocide, when all they're actually accomplishing is empowerment of the state and a bit of self-congratulations and unmerited feel-good self-righteousness.

They are, in other words, meddlesome nuisances with monstrously distorted notions of compassion.  Even if they comprise the majority, there are political and religious reasons to insist that abortion cannot be outlawed or otherwise become inaccessible to any pregnant female who sincerely desires it.  Even if she is a young adolescent, this is her decision to make and a government that doesn't guarantee that right is not a legitimate government.

Saying in law that abortion equals murder would reverse all historical precedent related to the beginning of life and the role of the state in managing spaces INSIDE the human body.  It would also impose a religious worldview that violates the historically majority positions of most religions that life begins with the first breath or with quickening.  We have social consensus that life unquestionably exists after birth, but we do not have consensus about the status of the fetus.  The pre-birth status of the fetus has been a religious question--not a scientific or legal question--for millennia.  Because our religions differ on pre-birth status, we will never have consensus and the state must protect choice.  Issues like abortion (and gay marriage) should be arbitrated primarily under freedom of religion.  The entrance of the state into this domain constitutes a tyrannical imposition and is a violation of natural law, which guaruntees reproductive freedom and the biological and herbal means--in pre-surgical models--to exercise reproductive sovereignty.  The state has no right to create a new class of "human" beings and mandate--against the majority of cultural precedent about when life begins--an essentially religious dogma.  Such imposition should be resisted by whatever means is most effective, and it is virtuous to challenge, disobey and impede any and all restrictions on access to abortion.

Even if abortion ends a human life, the principle of sovereignty over one's own body is more politically and spiritually important, trumping any "obligation" to carry an unintended pregnancy to term.  Abortion may indeed be killing in some sense, but if so, it's killing that the mother has a right to.  Abortion is not, in any sense, murder and not a cause for guilt or shame.

Abortion rates suggest some misdirected energies, however.