Assume for a moment that there's a great uprising and people's militias have taken over almost everything and are duking it out among each other for supremacy.
The USSC is overthrown and the old laws have yet to be recognized by competent authority.
The question is would it be morally required to dispose of the Tillers among us as they are encountered?
Good question. Lawlessness is not good anywhere. Tiller's killer acted in a lawless manner and according to our laws he is considered no better. But then again, the law that allows for aborting babies in the womb is child murder and is in itself lawless.
When the Constitution is not protected, it is essentially useless. When there is a law on the books supporting a woman's right to secure the murder of her baby, the concept of "Life, Liberty, and the Pursuit of Happiness" is in grave danger, if not nullified.
So, it would be safe to assume that the USSC is in the process of being overthrown and the old laws are struggling to be recognized by competent authority.
What do we do with the Tiller's of the world if there is a great uprising? We still must look for the face of God and pray that our redemption is close. Unless the rules of a just war are followed, we are no better than Tiller the Killer.