Souleyman deserves multiple kicks to the nuts.

He's the one that acted like an *beep* on purpose (the reason for his behavior never being explained, don't know if this was intentional on the director's part), sitting at the back all "I'm too cool for this class" and perpetually lashing out at others.
He got what he deserved in the end, such a kid who doesn't want to be helped needs to be kicked out.

The larger point is, I don't get how tolerant teachers seem to be in Western schools in general, of insolent and disruptive behavior in classes.
Bit of background first- I'm Indian. I've seen the point made here in other threads that French schools enforce more discipline and teachers command more respect than their American counterparts, but for me Indian schools go way beyond.

Kids would get suspended or expelled for far less than what has been shown here - insulting a teacher and injuring a classmate is absolutely not tolerated. And I haven't even got to that American archetype: the school bully who beats up smaller kids and takes their lunch money. No such kid would last long in an Indian school.

Maybe it's an 'Eastern' thing - Asian countries (newsflash: India is in Asia,for all those who think Asian=Far East/Oriental only) value respect for elders.
This includes teachers, and given that a teacher is supposed to be a knowledgeable adult who's teaching you, there is a sense of innate respect that the Indian student has which his Western counterparts either completely lack, or have in a much more diminished capacity.