The hatchlings barely heard what the guide said. It is because they were not listening. Most of them were focused on the ongoing fight at the arena in the Colosseum. Some were confused by the sight but others were visibly excited. Their eyes were gleaming with excitement as they watched.
People were fighting and dying before their young eyes. To be accurate, livestock were fighting each other before their young eyes. To them, livestock aren't people with rights so the violence didn't repulse them.
The hatchlings picked their favorite fighters and cheered them on. Soon they were chanting "Kill! Kill! Kill!"
They are the only ones in this massive arena so the thirst for violence didn't infect them from an external source. They are solely responsible for their thirst for violence. It came from their young minds. It made Legion-5 wonder how terrifying the adults would be.