ROBIN EMMOTT and DAVID BRUNNSTROM THE United States, the European Union, Britain and Canada have imposed sanctions on Chinese officials for human rights abuses in Xinjiang, the first such coordinated Western action against Beijing under new U.S. President Joe Biden. Beijing hit back immediately with punitive measures against the EU that appeared broader, including European lawmakers, diplomats, institutes and families, and banning their businesses from trading with China. Western governments are seeking to hold Beijing accountable for mass detentions of Muslim Uighurs in northwestern China, where the United States says China is committing genocide. China denies all accusations of abuse.…