The principal told Ty’s mom in an email that if Ty said something similar again, the school would follow the same protocol.

Instead of the principal having a single brain cell capable of empathy, they decided that instead of engaging with the child and treating them with respect, they will catastrophize the child's colloquialisms into intentional bomb threats.

They know the child has used the term "blow up" to mean "blow up emotionally"/the child is in trouble. They are intentionally punishing the child for nothing.