I just did what I do best. I took your little plan and I turned it on itself. Look what I did to this city with a few drums of gas and a couple of bullets. Hmmm? You know… You know what I’ve noticed? Nobody panics when things go “according to plan.” Even if the plan is horrifying! If, tomorrow, I tell the press that, like, a gang banger will get shot, or a truckload of soldiers will be blown up, nobody panics, because it’s all “part of the plan”. But when I say that one little old mayor will die, well then everyone loses their minds! Introduce a little anarchy. Upset the established order, and everything becomes chaos. I’m an agent of chaos. Oh, and you know the thing about chaos? It’s fair!
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Do I really look like a guy with a plan? You know what I am? I’m a dog chasing cars. I wouldn’t know what to do with one if I caught it! You know, I just… do things.
This is why the Joker isn’t a villain. This speech right here. He’s not the bad guy at all.