This is what should be done By one who is skilled in goodness, And who knows the path of peace: Let them be able and upright...
The difficulty in such situations is often being
able. Being a good enough social psychologist, or lawyer, or salesperson to make a good change, rather than intervening clumsily and inflaming the situation.
So I know what I should do, and I hope I would have good intentions. It was heartwarming to see the first man intervene effectively. But often the practical mechanics of the intervention are where the difficulties lie, and are what prevent more people from getting involved.
And let us try to have good will for all those concerned.