The American flag has become a symbol of resistance against China in the ongoing protests in Hong Kong, prominently waved throughout the city this past weekend as police fired tear gas and rubber bullets into the peaceful crowds.Millions of Hong Kong residents have participated in rallies since early June against a bill proposed in the city’s legislature that would have allowed China to extradite anyone present in Hong Kong by accusing him or her of breaking Chinese law. Under the “One Country, Two Systems” policy China agreed to when the U.K. handed Hong Kong over in 1997, Hong Kong must...