We have to teach our children an "heroic national narrative" (in the splendid words of Australia's John Howard), one that teaches them their history warts and all, as opposed to (as now) warts only. A nation cannot survive as merely a big zip code: it has to be understood as the physical expression of certain ideas and the ongoing projection of a grand inheritance. If we can't articulate why sharia is wrong even if it's legitimized by plebiscite, then we fully deserve to end our days living under it. It's not about Islam. It's about us.