Kid climbed onto the slide just after my girl was about to go down,kid jumped over when we changed slides, jumped back when we changed, racist profanities about forgieners using his slide, mum saying its a Korean slide and her kid is Korean.
The mother's reaction isn't unusual. My wife's friends have encountered school employees who ignore or even encourage bullying. I have been sorely disappointed in Korea when I expected Koreans in a position of authority to do the right thing.
I am sorry this happened to your daughter.