A fertilized egg is a human life. Tubal pregnancies are risks to the mother; no one, not even me, has suggested that you can't take the baby to save the mother. If the mother dies, both die.
You've mostly been pretty solid on anti-abortion but you're leaking your true position... There are cases where you believe it is acceptable to take a human life, ripping it apart, limb-from-limb, snapping it's little head from its spine...
The only intelligent, reasonable, honest answer is no abortion except to save the life of the mother. No exceptions.