bigbird, the issue of abortion revolves around whether it is a child or a blastosphere. To your point of religious freedom, currently there are no religions able to practice human sacrifice, child or otherwise, within the United States. So Religious freedom could be said to be denied to those who would practice that ritual. That's a concession we made as a society because we the people collaboratively determined that that's not a part of who we want to be. And there are currently no religions that require abortion - regardless of their stand on child or "fetus." And for those religions that believe life begins at conception (the big 3 - Christianity, Judaism, Islam; plus their offshoots, cults, Masonry, etc.) abortion is taking a life, akin to murder.
So if abortion were to be outlawed (most likely with caveats) there are presently no registered religions in the USA whose faith would be denied. I know this because its my vocation to understand and ensure that the religious freedoms of service members are not infringed. This is not a religious freedom issue, its a morality issue. Its difficult to imagine anyone today who can deny the personality and identity of a child in the womb, particularly with the incredible technology we have today to observe her development at each stage. Science continues to affirm and support the presence of emotion for example during the first trimester, a character trait not even found among most animals. As medical technology continues to grow, the ancient mythology of the "fetus" will go the way of the flat earth and spontaneous generation.
In which other circumstance would one human being be given the right to take the life of another human being, for any reason, without the consent of the victim? If I needed a kidney to live, would it be okay for me to kill my child to get one because of the likelihood my body would not reject it? Of course not! If my child volunteered to donate a kidney, we'd say that's okay. I believe in the fundamental right of all human beings to life, liberty and the pursuit of happiness as long as it does not require another human being's life to be taken.