if this were a generic series, this encounter would lead to a suggested duel where our MC Teacher turns the Student strong enough to fight back and even win the duel. i really, really, hope we're not going for that though.
"as long as nobody tramples over that pride he won't pick a fight with anyone."
this has been established to be false, that kid is a psychopath willing to attack anyone anywhere for any ridiculously petty reason.