I can understand why he would want to do something like that in the first place. With his belief system, he believes that aborting babies is just as much murder as, say, ISIS beheading people (And there are plenty of people who think that radical Muslims deserve to die.). In the US alone over 55 million babies have been aborted since 1973, so I can see why he would want to take some kind of action against that. But I don't think killing the people that preform or encourage/condone the abortions is the right way that he should go about it (since he's obviously going to want to take some kind of action no matter what). He claims to be a Christian, and the Bible states that vengeance is for God in Romans 12:19, so he should stick with that instead of telling people to do it themselves. But something that would fit within a Biblical belief system would be preaching to them and telling them to repent, which is what he should be doing as a Christian.
Can't wait for The Zelder Scrolls 3: Breath of The Wild Hunt!