Itachi did the world a favor by ridding it of a clan of deranged psychopaths.
Itachi, Shisui, Itachi's girlfriend were the characters that we knew of that were good people. There must have been many more.
Itachi was simply too wise and strong to be affected by the curse of hatred, same cant be said for the rest of these retards.
...Shisui, who fucking killed himself just to avoid the possibility of war after the Shadow Hokage (Danze) fucking ripped his eye out.
Like, literally the entire conflict happened because of Danzo's stupid, perverted mind.
All heil Itachi Uchiha
Itachi's fundamental flaw is his utilitarian philosophy.
This is also the reason that he's not the main antagonist of the story like Naruto.
He's actually comparable to Danzo, Madara, Pain, etc.
These dudes are all utilitarian who believed that they were doing good when the ultimate calculations were to be done.
The number of innocent lives lost because of their actions was small in the grand scheme of the shinobi world, and were necessary exchanges to avoid more innocent lives lost.
What makes Itachi better than Madara and Danzo is that he wasn't a delusional narcissist/egomaniac behind those calculations.
He was willing to make himself a sacrifice for greater good which is something that Madara and Danzo truly weren't about (only in their heads).
However he was still wrong.
Utilitarianism is wrong because in the real world, we don't know how things actually turn out.
In his calculations, Itachi massacred his clan to avoid a greater number of deaths from civil war but it's not guaranteed that things would have turned out that way.
What if the war would have somehow resulted in less deaths than the massacre (say that the leaders of either side were killed)?
What if a good shinobi, maybe 3rd Hokage himself, used talk no jutsu to convince Itachi's father to change course?
Any multitude of things could have happened and Itachi's actions might have actually resulted in greater tragedies.
Danzo became stronger (both in battle and in politics) because of the massacre.
Danzo contributed to Pain becoming what he became by giving intel and advice to the kage of hidden rain village to attack Akutsuki.
We all know that Naruto wouldn't have done what Itachi did.
He would have tried to do the impossible by keeping both the innocent members of the Uchiha safe and the village safe.
Maybe that would have resulted in more deaths, maybe less,- but ultimately faith, hope, and categorical principles drive Naruto.