China, though it is remarkably open to "Overseas Chinese" is apparently intolerant of its citizens who naturalize elsewhere:
Xinhua November 28, 2012
A businesswoman who renounced her Chinese nationality has applied to relinquish her membership of the political advisory body of a Beijing district.
Zhang Lan, founder and chairwoman of the Beijing-based restaurant group South Beauty, has submitted a written application to give up her membership of the Beijing Chaoyang District Committee of the Chinese People's Political Consultative Conference (CPPCC), Zheng Huang, the committee's vice chairman told Xinhua on Wednesday...
China does not recognize dual or multiple citizenship. Chinese law stipulates that once a Chinese takes foreign citizenship, he or she loses Chinese nationality. It is unknown what nationality Zhang is.
Why don't we do the same thing when naturalized Americans don't actually surrender their former alliegances or minority Americans go abroad in search of their forebears' nationality?