Even if you posit that a fetus has all the same legal rights as a born person, well, that doesn't really change anything. No born person is allowed to violate another person's bodily integrity without their consent, and the person who feels violated is within their right to take any necessary actions to remove what they perceive to be a threat. Hell, the same party that is against women taking measures to protect themselves are the ones pushing for "shoot to kill for even a 'perceived' threat" gun laws.
Abortion to me falls under the same category as mandatory organ donation. The government cannot compel you to sacrifice your own body for the sake of another, even if it means the other will die.