Yeah, i've repeatedly mentioned this but he is intent on denying. Apparently as a big Madara fan, he wants to believe that there would be everlasting peace because Madara united everyone. And Sasuke was wrong for thinking otherwise.Just because I feel its relevant to add it to this. The Bloody Mist also planned on using the Three-Tails to destroy Konoha from the inside, which is why Rin killed herself. This is a clear example of a village using the Bijuu as a means to win wars and gain power. Not to mention that Hashirama used them as a bargain ship to create relations, meaning they were used for political power as well as military power.
And now that i think about - Madara himself tried to use the Kyuubi to destroy Konoha aswell as Obito several decades later. That's two more examples of the Biju's power being abused. Albeit not by villages in this case. But i have made it a point to constantly mention the possibility of criminals in the future, like the Akatsuki, trying to get ahold of them for their sinister plans.