The moment that Reese watched Clark slash down the last living blood needle parasites, he dropped to the ground. The memories were too vague for him to know, but he had the stories. Every single story about how the independence of his entire family and the village they had come from had been lost. How dangerous parasitic beasts were.
The fact that they had just found such a place so soon after leaving Terra City was also a massive red flag. It was more than just an insult to every single tamer working hard to grow. This was a clear act of war that was banned between city conflicts. Instead, this was used by the evil and disgusting monsters pretending to still be tamers.
"Reese, this is not the same as the tragedy your family and elders faced when you were too little to even know what a parasite was. This is the blood moon cult sending people off to cause trouble. We can send a report to Terra City and let them handle these things. We can't go back."