Bruce: Targeting me won't get their money. I knew the Mob wouldn't go down easily but this is different. They crossed a line.
Alfred: You crossed the line first. You squeezed them, you hammered them to the point of desperation. And in their desperation, they turned to a man they didn't fully understand.
Bruce: Criminals aren't complicated, Alfred. We just need to figure out what he's after.
Alfred: With respect, Master Wayne, perhaps this is a man you don't fully understand either.
Bruce laments that the mob turned to the Joker for help and crossed a line.