[Update, 6/10: As usual, Ryan captures the absurdities nicely in his comic.]
A progression of events:
(1) A doctor is murdered by religious fanatics who believe that Every Sperm Is Sacred and women should be forced to bring every pregnancy to term regardless of their wishes.
(2) Ed Feser, professor at Pasadena City College and enthusiast for doctor-killing, writes a blog post calling the victim a "serial killer" and comparing him to Jeffrey Dahmer. He says that "by committing his crimes, Dahmer had forfeited his right to life..."
Just in case anyone missed the point, Feser continues by arguing that Dr. Tiller was actually worse than Dahmer in every relevant respect. Hintedy-hint-hint.
(3) Brian Leiter points out this post, observing that Feser is an apologist for murder, which strikes me as being an unremarkable statement of obvious fact.
(4) Feser goes nuts about this, accusing Leiter of being a "liar" by so characterizing his remarks (along with providing a link so curious readers could judge for themselves), and pointing out in his defense a couple of sentences in the original post in which he had covered himself by saying that it's wrong to take the law into your own hands, etc., sentences that I have to say jarringly failed to fit with his overall argument. And I really do mean he goes nuts. Feser compares Leiter's claim that by (a) saying that Dahmer had forfeited his right to live, and (b) saying that Tiller was worse than Dahmer, Feser was acting as an apologist for Tiller's murder, to claiming that black is white and up is down.
(5) Jeremy Shipley enters the fray to make some obvious points about why few readers were likely to take seriously the claim that, if Dr. Tiller was really a "serial killer" who had forfeited his right to life, and the law totally refused to punish or stop him in any way, 'vigilantism' would continue to be wrong:
"Suppose a racist government refuses to protect a minority from persecution. Don't members of the minority have a right to protect themselves? Or, suppose a government refuses to outlaw rape. Would it not be justifiable to protect women by means outside the law? Do you really believe that there are absolutely no circumstances in which vigilante action is justified?"
...from which Shipley makes the obvious point that Feser's pro forma "condemnation" of the murder the rest of his post apologized for was not meant to be taken seriously. Duh.
(6) Feser posts a pseudo-detailed reply to Shipley...he presents it as if it was a point-by-point reply, responding with huge blocks of text to individual sentences of Shipley's, but he conveniently omits the entire paragraph quoted above. (If he'd included it, the reply that he'd made would have ceased to make any sense at all.)
(7) Feser concludes by complaining that Shipley did wrong by failing to "read what I wrote charitably..."
So....fair enough. I will now attempt a more charitable interpretation:
Feser really did mean those couple of lines "condemning" the murder, despite the fact that the obvious implication of everything else he said was that the murder was justified. Also in the spirit of charitable interpretation, I won't interpret Feser as just typing random words and not realizing what those words meant when he penned a crystal-clear argument for the conclusion that Dr. Tiller deserved to die.
Charitably, I'll assume Feser's few token lines condemning the murder should be taken as seriously as his argument that Tiller had it coming. It must simply be that Feser subscribes to a paraconsistent deontic logic in which P(A) and ~P(A) sometimes non-trivially overlap. Dr. Tiller's murder was both permissible and impermissible.
That must be it.