He did kill a dude. When they rolled him over, it was a different person. Regardless, even if it was all a hallucination, he was willing to do so.

Ha, fair enough.

Okay, but here's the rub with Oliver being stripped of Oliver: he's no longer the person that R'as felt should be his heir. If he becomes no more than any other League Assassin, what's the difference between him and someone else?