Freaky stuff. and awesome episode
Its actually makes perfect sense to me for the leaf to kill Sasuke, why allow another village to kill your people? that would just lead to the vendetta war that shikamaru talks about. I thought that was one of the main purposes of the Anbu - the hunting and killing of missing-nin. I suspect that it maybe Danzo's intent to secure his position as hokage by instigating a war with the hidden cloud through a vendetta war. It totally suits his persona to sacrifice some ninja to secure his position.