The problem is, times have clearly changed by now. Also, it wasn't Naruto's ideals that caused all of this, it was people's selfishness. It was Danzo's selfishness that got the Uchiha killed, it was Madara's selfishness in using Kurama that got the tailed beasts sealed away, and it was Indra's selfishness in waging war on his own brother out of jealousy that began this centuries' long feud.
Also, what is Sasuke's plan? Madara wanted everyone to be happy, but, Sasuke doesn't plan to pursue he IT, either he wants a world with no leaders (anarchy) or he wants to rule with an iron fist. He's even worse than Madara in that regard.
Also, why do I say Naruto's ideals of peace and understanding are correct? Because it worked in our world. Sure this world is far from perfect, there's still hatred, and war, but, if you truly look around, it's no where near as bad as the past, the world is becoming evermore peaceful, sure, there's missteps along the way, but nothing happens over night. And, did we need anarchy or tyranny to achieve this? No, but understanding, and kindness, we needed the world to get smaller, for us to begin to see people as equals, as other humans. That's what's happening in Naruto, that's what happened in the War Arc, hand Sasuke is standing in the way of that.