I am afraid you have read way too far into my comment. It really isn't, it's simply a way of rephrasing the argument, rather than just saying "I am Pro-life" which will get surely downvoted to oblivion, I phrased in a way that might make sense to rational thinkers -- that I believe civil rights should be applied to all created beings, both born and unborn, but boy was I wrong. I am legitimately interesting in supporting civil liberties, as I have had the graces of benefiting from civil liberty groups myself in the past, I just cannot look past the fact that the ACLU views persons inside the womb as somehow less human than those immediately outside.
I think I read into your comment exactly how you intended and have just described. Perhaps the "intentionally" portion of my "intentionally passive-aggressive" comment was incorrect, but the rest of what you just described is exactly what I (and I presume other down-voters) understood your comment to be.
Your phrasing as "I believe in the civil rights for all people, outside the womb, and inside" carries the implicit assumption that pro-abortion people do not, in fact, believe in the civil rights for all people. The reality is that the down-voters likely do believe in the civil rights for all people, but do not believe that a fetus is a person yet. Since that is generally the debate between those who are for and against abortion, the feeling of passive-aggression from your comment stems from entirely disregarding the other side's point of view and instead simply implying that they don't care about civil liberties.
FWIW, I think just saying "I am pro-life" wouldn't have gotten you down-voted to oblivion.