I really wish people'd stop hating on Sora for this :I he had absolutely no reason to try and understand the org. This is more than just Yen Sid telling him they were evil so Sora launched at the first unsuspecting guy in a black coat.
He launched at the pack of unsuspecting people that sent Nobodies and Heartless to try and run over Hollow Bastion.
He had Xaldin giving him very few reasons to even care why the hell they were doing what they were doing.
And then we have Demyx whom Sora did not attack on sight when he first saw him, not until he 1) already met him before, so this was their second run in, and 2) Demyx attacked first in their first meeting, 3) Demyx was stopping him from helping out Hollow Bastion.
Luxord sent out the Heartless on Port Royal.
Saix came in to toy with him whenever he could, making it I dare say personal.
And well, Xigbar was somehow possible remotely ok, but he did attack first, and it was at the end of the game so fawk it, why yes try and understand?
Just because we know what the Org's motives are doesn't mean Sora should even care. Also, it doesn't really matter how much we might like the Org. I love Saix to death but that's because he's a cold "hearted" bitch that needs to be put down. He had everything Sora handed him well earned, as did every other member of the Organization Sora took down. Yes, including Demyx who isn't as innocent as people like to make him out to be.
It's not so much that I think he should try to get an understanding in the sense of "bwaaah, Sora doesn't even get them! How dare he kill my Dem Dem!?" But I was disappointed when at the end of the game Xemnas asks Sora why he hates the nobodies so much and Sora says something like "You're not supposed to exist", and then Riku has to step in and say "Because you mess up our worlds". That answer would be more satisfactory if we had been able to see the destruction brought along by the Organization's actions. The best we see of that is a small part of Hollow Bastion being destroyed and the only person in a Disney world that's really affected by Org XIII is Beast. Though I suppose Riku has a better understanding of the bad things happening because the Organization, with Sora having to go to sleep, and whatever happens to Xion.
Then there are parts where somebody from the Org. is talking and Sora's just ignores them and makes some dumb comment.
Xemnas: "hearts, kingdom hearts, etc. etc."
Sora: "Give it a rest!"
If I were Xemnas I wouldn't be able to take him seriously.
He could probably handle them more effectively if he would try to figure out their actions, but he doesn't. He just asks everybody he knows if they've seen people in black coats, and if he's lucky enough to come across them he whacks them around until they die. Meanwhile, Riku, Mickey, and Ansem were behind the scenes making what I think is a more efficient effort to stop the organization.
I blame bad writing more than I blame Sora, if that makes any sense. He had plenty incentive to destroy them, he knew that they had hurt Riku and taken Kairi, and that they were using him, but all he can do when he meets them is make childish remarks.