Why do I get a facepalm? TDK was essentially a tale of good versus evil. There is never any reason given to the Joker's evil, he just is. Take away the great acting by Heath Ledger and brilliant direction by Chris Nolan--the Joker is just pure evil. No different really than Parallax. That is why BB is the much deeper movie with Ras as the villain.
The Joker actually gives his reason a lot. to create anarchy and upset the establishment that thinks it has control over everything and to prove everyone is capable of evil when pushed to that limit. Thats was his point and agenda. watch the movie again, its CLEAR.
The Joker was the "terrorist" but to what? the already corrupt establishment?? and u have to remember he didnt just go killing random people at will. he killed the bank guy in the beginning cause he shot at them. Joker was out against the mob for being cliche villains and not setting a standard for the city which thinks it has an authority to be ran by the order. Joker isnt just mindless villainy. He actually has a very HUGE point. Its like the stuff he does are the jokes and the punchline is the finale that he actually accomplished with harvey dent turning evil due to being scarred an pushed.
Listen to everything the Joker says. u cant be so shallow as ot think its as black and white as that. Joker even makes a point in painting batman as much a villain himself. makes us question the line between good and evil the whole movie and who sets that line there and who has the right to cross it.
He feels if batman can get away with his theatrics then so can he. The movie had so many layers dude...come on.