Thread:Omega64/@comment-4503935-20190703001710/@comment-10330822-20191106021723

Sasuke is more of a consquence of it, rather than an example.

The futility is basically what Tobi and Shikamaru explained, people/shinobi fight to protect what is close to them, a village, a clan, or a teammate. When one is taken from you, you strike those down responsible out of hatred. However, in the process, you take away what someone else strives to protect and they strike out of hatred. The process continues and a cycle of hatred is formed. Each act of aggression or revenge forms a new link. And as Tobi pointed out, as long as their is love, there is hate.

Madara and Tobi gave up on the world when they discovered this endless cycle of hatred had been in place since before even the dawn of chakra and the first shinobi. Which means it was a natural human flaw.

Sasuke is just a consquence of this, the acts of dishonor against his clan cause him strike out with everyone directly and indirectly responsible. And, Danzo pointed out that Sasuke's actions aren't even about revenge, he is just lashing out with his hatred, striking out at everything in his way or even remotely connected to his target.