What he means is he was killed and raised as an undead KA. Why do you think his avatar is the shape of a cross but not a cross?

Besides everyone knows that if you die your not dead you have to die die and be dead dead or else you become a zombie or some other shit duh.

And to shinto you watch too much Naruto if you dream of being helpless and stabbed. why do you think so many emo kids like Itachi? They get that same dream and they love it.