> If merely hearing an opinion threatens your model, that’s probably a warning sign indicating that your own ideas are fragile and unsustainable, and they need

> If merely hearing an opinion threatens your model, that’s probably a warning sign indicating that your own ideas are fragile and unsustainable, and they need to be exposed to ideas that challenge them. This doesn't strike me as a universal truth. It's good as a general principle to test your ideas against ones that challenge them and make sure they're as robust as possible -- but if that "challenging idea" is "your group has no right to exist," then it's not reasonable to argue "if merely hearing that you have no right to exist threatens your model, that's a warning sign that your own ideas are fragile and unsustainable," is it?