When invading the parallel ninja world, why are all of them guides?

Story of: When invading the parallel ninja world, why are all of them guides?

After 40 years of the Konoha calendar, the time traveler Chang Ye unified the five major countries, and the ninja world entered the imperial era.

In the 20th year of the Imperial Calendar, the Imperial Exploration Team arrived at the Parallel Ninja World, but they found that this Ninja World was a little different...

Naruto: Am I not the son of a hero? Why am I living such a miserable life?

Obito: I am a living beast for killing my teacher and his wife who were so kind to me!

Itachi: What I am doing is even more outrageous. I am worse than a beast here!

Senju Tobirama: The biggest mistake I made in my life was accepting those four disciples!

On the other hand, the attitudes of the people in the invaded parallel ninja world gradually changed, and they defected one after another:

Sasuke: The trash Konoha destroyed my family, I request sanctions from the Empire!

Gaara: Rasa is unworthy of being a father, he might as well not stay in the Sand Village!

Hyuga Neji: When will the Empire invade? I apply to be the guide!

The foreign demon king has landed in the Kingdom of Wind, man-eating monsters have occupied the Sand Village... His Majesty the Emperor will arrive in his loyal Konoha today!