Kahga also says she wants to protect the Grove - and thats apparently achievable by removing the refugees... how or why is irrelevant. It just is, mkay?
Only then the ritual can be done and seal the Grove... for how long? Dont ask. Grove sealed - we safe - refugees bad.
We are afraid and Kagha has easy answers. We also do not ask questions.
If only there was some sort of real world example of a xenophobic leader imprisoning kids, blaming refugees, wanting to build a wall, and having support from a significant portion of the population despite it going against supposed core principles of their country!