No, it was a former patient from Arkham, who was a paranoid schizophrenic. It was most certainly not Cillian Murphy who was only in the very beginning of the movie where he was shown being little more than a 2-bit drug dealer.

They explained that most of the Jokers "henchmen" were psych ward patients who gravitated towards his character. Example: the human bomb in the Major Crimes unit who said that "The Joker promised he'd take all the bad and hurt out and put pretty lights in!"

You really have no idea what a symbiotic relationship is. "Helpless without a specific entity" is quite different from "needing assistance." The point is that a fetus is NOT its own entity until it can survive outside of its mother. After that, it's no longer symbiotic. Though babies are certainly quite helpless, the care need not come from a specific person.

Furthermore, where the fuck do you derive "crippled persons should be sacrificed" from "fetuses are not their own entity?" These are two completely different and unrelated statements. You're right that the first one makes no sense. You're wrong that this has anything to do with the abortion debate.

Incidentally, if a crippled person WANTED to be "sacrificed," I believe he should be given the same options -- and counseling -- as a potential mother seeking abortion. I think it's fucking COLD that we force the crippled to burden their families and insurers if they don't want to be. It's why I have a "living will" saying KILL my ass.