Schools are not intended to moralize a wicked world, but to impart knowledge and develop intelligence, with only two social aims in mind: prepare to take on one's share in the world's work, and perhaps in addition, lend a hand in improving society, after schooling is done.
I just did what I did and I still am. It makes you unpopular, maybe for a lifetime, but I'd rather do that than be popular and doubt what I am.
Violence is always the last option, but if that time comes, it is the ONLY option.