Abortion is never going to be illegal in cases of rape, incest, or danger to the mother’s health. Abortion as birth control is a different matter.
Why wouldn't it? If a fetus is a person and abortion is murder, it can't suddenly be ok if it was conceived in rape.
Abortion is feticide, not murder, and a fetus is a life, not a "person". The destruction of life is something which should be avoided even if it is not murder. But this is an unimportant distinction in this case. In the case of rape and incest, it is a matter of self-defense - it is unambiguously morally acceptable to kill in self-defense, even if the "attacker" is not morally culpable.
