Well I wasn't comfortable with the wording of that post you responded to, but neither am I comfortable with all this over-acceptance of sin. If the daughter's sin were racism, adultery, drug abuse, alcoholism, violence, etc....we'd still "all be sinners," but I doubt everyone would be tripping over themselves to say we should "love the sinner" and shouldn't offer up some social shame -- a type of real love that aims at leading the offender to repentance.
By the same token we should not be tripping over ourselves to castigate this case. I agree with your point but don't think it is necessary to single it out for special attention.