I think I read into your comment exactly how you intended and have just described. Perhaps the "intentionally" portion of my "intentionally passive-aggressive"

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.