This where we will just have to agree to disagree. How much consideration have you given to exactly why you believe this? That's a very specific combination of words you just used. Do you know where they came from?
Why that exception?
What defines a human and why is human life so important that it has to be protected?
So do the people who believe that genocide is a good thing deserve personhood? (As you define personhood; life?) Is rehabilitation the answer? What's the solution to the a willingness to want to end another human's life for reasons that you have deemed immoral?
I believe y’all have all three asked variations of the same question, and a single answer we will suffice.
For me personally, I did not hold the same value for human life before coming to Christ as I do now. Some will use that as a way to write off my views on the subject, and so be it. (Though I never supported abortion even before then, at most I kept it at the uneasy arm’s length of “I’m not a woman, so it’s not my decision.”)
I do no believe that this has to be discussed in religious terms as ideas of the value of human life and the wrongness of murder should be fairly universal regardless of theistic views. I would expect the most ardent Christian, Muslim, and atheist to all be able to agree that murder is wrong. I believe the question at hand is what constitutes murder. Otherwise, there is no common ground to be found at all, and no point in engaging in the conversation.
Many things in life are not easily defined by a binary, some are. This is one of them. Either all human life is of intrinsic value, or none of it is. One position holds that the lives and dignity of individuals should be protected, the other allows those with power to subject those without to the most horrid treatment imaginable. There can be no metering of one life over another that doesn’t render all ideas of human rights as arbitrary and meaningless.
Even the life of the most horrendous person holds value. Regardless of the things they say or ideas they espouse, as long as they do not pose an immediate physical threat to another person’s life or physical well being, there can be no justification for taking their life.
Finally, how to protect the innocent from those who would do them harm is not a simple one size fits all solution. It’s many hard questions with many hard answers that must be wrestled with individually.