It's actually quite simple to make humans submit.
Constantly tormented by illness, human military strength has been greatly weakened, and they have lived underground without sunlight for years.
Just fight violence with violence.
If Josh hadn't seen the video, she might still want to speak with them reasonably.
But after watching the video, the only reason stopping her from killing all humans is not wanting to fail the main quest and drag down her teammates.
*
Josh and her teammates appeared with the hospital's half-cat people in the ruined city, coming in with great momentum.
Women with children were basking in the sun, enjoying the rare sunlight.
Seeing so many people ostentatiously arriving, they hurriedly took their children and hid underground in fright.
Josh grabbed a patrolling soldier: "Go tell your base leader that we are here to negotiate."
