Who killed Itachi?
Itachi died of his own free will, and by his own plans, to his beloved brother!
No one can kill Itachi!
There have been only 3 actual fights where Itachi was either serious or had no choice but to fight. Let me remind you, all these fights were ended in seconds:
Itachi vs Deidara
Itachi vs Orochimaru, this fight happened on two occasions:
Itachi vs Kakashi
Please dont think if me as a fanboy of a specific character, that would be insulting my intelligence! I am a fanboy, but not of a fictional character, I am a fanboy of Masashi Kishimoto and his work. To prove that his work has signaled towards this statement is my work! So here it is....the moment the manga itself made this person into what he is:
So you see, no matter how much you may hate an unreal character from a story, as sad as that is, it should not affect manga facts! The same way I have accepted that Tobi is Obito, you must accept that Itachi is and always will be, invincible!
I know you will try and troll me with the Sasuke thing so here: