Naruto: Varying ideals

The shinobi world is no longer the same as it was hundreds of years ago. Aliens who identify themselves as Otsutsukis have colonized the world and kept shinobis as their slaves... It's already been hundreds of years now and humans have just accepted their fate in front of otherworldly strength.

But not all of them.

Radical and rebel groups still exist. The struggle is still on to join annual freedom fight. For Otsutsuki's it is an entertainment...for humans it is a chance for freedom.

But wait. These groups have been running for centuries. So what is different in fighters of this generation? generation which has no life in their eyes? I guess we will have to find it out in the book.