zlaywal: I think the only human made law that resembles justice is an eye for an eye.
Bah. That's a dumb law too. But for the rest, yeah, I'm not super good at preserving people from my points of view either. Humans are used to live protected by a safe layer of gooey hypocrisy, and to keep their judgements on each others hidden behind smiles, politeness, and plausible deniability. It probably makes society more sustainable (you may require tomorrow the good will of the person you despise today), but there is also something terribly unhealthy about it (people keep lying to each others and to themselves about their perceptions of each others, instead of questioning them and their implications). Paradoxically, I see more respect in insulting people straightforwardly, stating the issue, than in concealing the judgement and its reasons. In insults, there is often, implicitely, a reproach, and a request for change. In silent, hypocritical contempt, there's a desire for status quo, maybe even to preserve the feeling of superiority. Finding it more enjoyable than distressing.
So, yeah. Totally the "burning bridges" sort, here. At least, when I'm unfair, people know it and can correct me. But I'm tired of people pretending. That makes me a handy spokesperson to hurl into the flames from a safe distance. Heck, at least I can be useful like that. To ordinary everyday cowards with ordinary everyday normal lives.
So, I'd say, your choice. Leave people some way out, in order to not regret later having possibly wounded them exaggerately. Or don't, and play the role of shaking some people who are not used to it, and should be shaken more often. If anything, it'll let the rest of your family play "good cop" and balance it out. But understand the pros and cons, and the relative validity of the opposite stance.
Also, maybe simply take the time of evaluating whether the bridge deserves to burn, or should be spared the damage. Don't gratuitously hurt people who, sometimes, are already less self-satisfied than they display. But I suppose that, as you required one specific idiocy to cross the tipping point, you're already somewhat cautious about it...
(And yeah, echoes of this in my life, these days.)