Re: To the people who think itachi is guilty of his choices. (Read)
I believe he wanted to end the hatred cycle of the Uchiha with the leaf village. Think about that..
End the cycle of hatred by murdering innocent women and children? Then turning his brother, the last surviving uchiha, into a rage-fueled revenge freak? Then joining a criminal organization where he helped to capture and eventually kill several jinchuurikis among other people, and ultimately helped to start the fourth ninja war?
Sorry, this doesn't make sense. Itachi is a bright person. Even if he had different plans in mind he should have been aware of the other possibilities.
Let's look at the alternative. Let's say Itachi went into the Uchiha section of the village and only killed the combatants and maybe a few other adults who knew about the truth. He leaves the children alive. What happens?
1) The children would bond together more closely, because of their shared loss
2) The children would be cared for by the village and would have formed deeper bonds of friendship with the people who are taking care of them.
3) Since Itachi performed the murders, they would have wanted revenge against Itachi most of all, and would not have been angry with the Senju or other clans.
4) The adults and other people who remember the curse of hatred would have been dead, and the children would not know it.
5) Konoha still would have had Uchiha citizens, which would have helped keep Konoha stronger in the long run and helped to deter future threats.
6) Sasuke wouldn't have been an outcast and a loner, if he had other children from his clan to bond with. He might have formed the necessary bonds to decide to try and protect Konoha instead of deciding to destroy it.
There's actually MORE peace and stability if Itachi would have left the children alive.
Also, consider this: In retribution if Itachi had killed Danzo at the same time as the Uchiha massacre (since Danzo is a murder-crazy war-hawk), the village would have been much better off. The invasion of Orochimaru might not have happened if Orochimaru and Danzo weren't working together still. In fact, Orochimaru might have never even become a bad person if Danzo hadn't been using him for secretive, creepy, evil missions. If Danzo hadn't been around trying to become Hokage, lots of bad things wouldn't have happened. If Itachi really wanted peace, he should have killed Danzo and spared the Uchiha children.