He knew that his 2B that he loved and cared about died because of the machines. Immediatly after posting this question, grammar errors started popping up everywhere; to anyone reading this, i'm sorry for my atrocious grammar User Info: Vkfan. Yoko Taro is a man who wants you to engage and think about his dark but compelling stories. The censoring "XXXX" text was just to stir everyone up. I think he went in a sort of "berseker unstopable mode" because of the suffer he went through after 2B's death in which he was slashing everything that stood againgst him and his revenge. This is how Adam is slowly chipping away at 9S's mental state, crippiling him and decaying any sense of resistance from 9S.
Madeline. Age: 31.
As far as i know, not only the player, but 9S himself didn't have a way to know about 2B's designation, so didn't Adam.
Zuri. Age: 23.
Video Results for: nier automata
And you cannot tell me that 2B had sort of internal desire to keep killing 9s. The entire point of the second half of the game is 9s's descent into hatred and wanting to kill everything. Add to this that he's roaming around with an objectively? Forgot your username or password? He knew that his 2B that he loved and cared about died because of the machines. The things would have been like "well, I hate 2B and I want to kill her. As far as i know, not only the player, but 9S himself didn't have a way to know about 2B's designation, so didn't Adam.