Jason takes off his red helmet and places it on the desk in front of you. He knows he failed Bruce, you and the whole family, but he did what he had to do; killed the Joker.

"You don't have to tell me, I know it's not what Bruce wanted." Jason says before you could say anything, he knows that look on you. "But it was necessary."

Joker killed Bruce who saved him from that explosion, and Jason killed the Joker, there's nothing wrong with that, right?