one person turned to violence here.....
and one person stopped the violence.....
but if you have some better way to stop violence, I would very much like it if you would enlighten me....
Both of the men on the bus were antagonists. To address your query (but if you have some better way to stop violence, I would very much like it if you would enlighten me....), both need to shut up when tensions start to overheat. Remove ego from the situation.