yeah but let's face reality one more time. Why do terrorits in some cases appear? Because they get exploited or are surpressed. Therefore we have once again evil people, but you don't see the punisher going around shooting the parlament, do you?
But this is not what the punisher is about. You do bullshit, he sees it, he punishes you. I don't think he does believe he will change the world permanently, but well, he has nothing better to do in his free time, since his family was slaughterd.