This statement, as such, is nonsense on stilts. If it were true, there would be no such thing as justifiable homicide or honorable killing in time of war.
The rationale for these acts is precisely that they are done to protect life.
The Bible throughout talks about the land crying out to God for the blood spilled on it. It is very interesting that AFAIK it always refers to "innocent blood."
I believe under Jewish law, and in many Christian systems, it is not only permissible to take life to protect innocent life, it is a moral obligation to do so when possible.
How exactly that principle should be applied to abortion doctors in perhaps another question, but unless one is an absolute pacifist it is just stupid to make such a claim as cited above. And very few people who claim to be absolute pacifists really are.
You bring up some interesting points that I certainly shall ponder. Thanks.