If abortion is to be the new Moral Issue That Cannot Be Compromised or Negotiated, must we have another "coming of the Lord" with a "terrible swift sword" for all the unbelievers and other people who condemn themselves to death and worse by disagreeing with you?
See how sticky this moral-issue business gets, and how quickly?
By the way, that's the essential game the Left likes to play. Moral issue + radicalization => pogrom.