Maybe God is calling Terri to be the martyr for the cause, I don't know. But I feel certain this is a test for all of us who are pro-life - a test to trust the Lord which I have heard people post about on this site quite often. Sometimes it's a matter of having the humility of realizing it isn't us...it really is God's will.
It's not God's will that she be murdered...I don't question it would be in his will to use her murder for judgement, example, or whatever else he will...but he would never, ever sanction her murder.