School propaganda became worse after Xi seized power

This video is from 2017 ( at least that's when I first saw it ). China used to be a safe place for foreigners but in has changed. There was this party propaganda that's used a negative rhetoric against outsiders ( foreigners or minorities) and all of a sudden we were pushed on the streets, told to go back where we came from and being called names. This became frustrating and annoying ( not always dangerous though but I was pushed on the street by 2 Chinese men only for being a foreigner).
How is this teacher so brainwashed and is willing to mentally abuse her students for a birthday date??