IMO Sasuke is the perfect example as to why Konoha wanted to wipe out the Uchiha. Danzou even states that by taking revenge on Konoha, he's pretty much spat on Itachi's grave.
Though it was kind of Itachi's fault for making him that utterly consumed with rage and revenge. I doubt anyone could have predicted what Sasuke'd turn into, but he didn't do him any favors.
Come to think of it, why did he do that again? I get that he wanted Sasuke to kill him, but why? Did he really **** Sasuke up that badly just so he could have a stylish death? I'm confused now..