Behaviour in Schools

I have some criticism about the national-religious education system in Israel, the so-called mamad ("mamlachti-dati") and the follow-up framework of high-school yeshivot. However, when I hear about and see incidents like the clip below, filmed at a secular high-school, I am thankful my children go to religious schools. I cannot imagine such behaviour coming even from the worst-behaving kids in my son's class.