They are in no way an endorsement of the offending behavior.

Let's consider two of the lines from Jiro's post:

• If you don't want people to be convicted of rape based on evidence obtained by torture, you also "want rape to be legal"

• Normally saying that someone wants X carries the connotation that they like X and don't believe X causes harm, which isn't true in this case.

Put together, it seems obvious that Jiro is pointing out a verbal technicality and you're interpreting him as if he means what he's explicitly saying he doesn't mean.

Jiro's post is highly contextual and makes sense only by taking into account what he's responding to. You may want to re-read the subthread.