>>82602623To the Joker, the world is this place on the edge, all it takes is a push and boom everything is done. Batman basically tells Joker, that you are a weak man who just snapped. He needs to continue to keep arresting the Joker and allowing him to suffer the consequences of the law. The moment he snaps and kills the Joker, he knows that the Joker will think that he is right.
Killing Joker is also a bit of a domino effect, as seen in Beyond and Injustice. People will idolize him, believe him to be a revolutionary who was killed doing the right thing. Not thugs who are getting paid, no, people who genuinely believe and enjoy the man's insanity. Therefore, killing Joker could cause even more chaos and destruction than arresting him ever could
