In the chambers of Wellington's Parliament, a remark meant to silence a lawmaker instead amplified a question that democratic societies perpetually wrestle with: who belongs, and who decides. New Zealand's Foreign Minister Winston Peters told Green Party MP Lawrence Xu-Nan — a man who immigrated as a child and rose to elected office — to 'go back to your own country,' a dismissal not of an argument but of a person's right to stand where he stood. China lodged a formal diplomatic protest, and voices across New Zealand's political spectrum began asking whether a man willing to deny a colleague's